{"id":1994,"date":"2026-10-16T08:00:00","date_gmt":"2026-10-16T08:00:00","guid":{"rendered":"https:\/\/prennox.com\/?p=1994"},"modified":"2026-10-16T03:55:41","modified_gmt":"2026-10-16T03:55:41","slug":"chieu-cao-ngan-xep-loi-hi-b","status":"publish","type":"post","link":"https:\/\/prennox.com\/vi\/hi-b-core-stack-height\/","title":{"rendered":"Chi\u1ec1u cao ng\u0103n x\u1ebfp l\u00f5i Hi-B: H\u1ec7 s\u1ed1 x\u1ebfp ch\u1ed3ng v\u00e0 di\u1ec7n t\u00edch s\u1eaft r\u00f2ng"},"content":{"rendered":"\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li class=\"\"><a href=\"#section-1\">Hi-B Core Stack Height: The Decision to Resolve<\/a><\/li><li class=\"\"><a href=\"#section-2\">Net Limb Section and the Adjacent Interface<\/a><\/li><li class=\"\"><a href=\"#section-3\">Material and Functional Evidence<\/a><\/li><li class=\"\"><a href=\"#section-4\">Comparing the Available Supply Approaches<\/a><\/li><li class=\"\"><a href=\"#section-5\">Inspection in the Delivered Condition<\/a><\/li><li class=\"\"><a href=\"#section-6\">A Worked Example and Its Limits<\/a><\/li><li class=\"\"><a href=\"#section-7\">Changes, Exceptions and Release Decisions<\/a><\/li><li class=\"\"><a href=\"#section-8\">Preparing a Technical Inquiry<\/a><\/li><li class=\"\"><a href=\"#section-9\">Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A dimension becomes useful when the reader knows its datum, tolerance and purpose. For the specified Hi-B laminated core, an apparently small mismatch at net limb section can prevent assembly even while the overall envelope looks correct. The practical question behind Hi-B core stack height is which dimensions must be controlled together, and which inspection state represents the part that will actually be installed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Hi-B laminated core directs alternating magnetic flux through stacked grain-oriented steel. The finished magnetic circuit depends on the steel grade, joint geometry and assembly stress together. This article concentrates on Hi-B core stack height, with practical checks for engineering, purchasing and incoming inspection.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-1\">Hi-B Core Stack Height: The Decision to Resolve<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Start the Hi-B core stack height review with the limiting interface: net limb section. Mark its reference surfaces on the controlled drawing, then identify where stack height and lamination width are measured. The receiving plant should be able to reproduce the check without interpreting an unscaled photograph. If the measuring point becomes inaccessible after assembly, arrange a recorded check before that stage closes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For Hi-B core stack height, magnetic polarization and total specific loss describe different properties. A high-permeability designation does not define an assembled-core loss guarantee; the excitation point, frequency, specimen method and finished assembly must also be stated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When evaluating Hi-B core stack height, remember that the clamping arrangement provides stability but also introduces mechanical stress. The designer should define the restraint arrangement; additional tightening is not an appropriate universal remedy for sound or loss concerns.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01.jpg\" alt=\"CRGO laminated transformer core with a blue clamping frame\" class=\"wp-image-1374\" srcset=\"https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01.jpg 800w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01-300x300.jpg 300w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01-150x150.jpg 150w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01-768x768.jpg 768w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01-600x600.jpg 600w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-01-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-2\">Net Limb Section and the Adjacent Interface<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Hi-B core stack height requirement sits between net limb section and window opening. Put both sides of that relationship in the review package. The supplier needs the current mating-part information, while the buyer needs the actual delivered condition. A requirement that is measured before miter cutting in the rolling direction may not describe the state that reaches final assembly. Confirm the point at which the interface is accepted and who owns any operation after it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a Hi-B core stack height review, substituting a thinner grade changes the lamination count, packet handling and potentially the effective section. A material substitution should therefore be checked against both the cut program and the finished stack.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For Hi-B core stack height, distinguish the physical feature from the property being evaluated. Stack height is one part of the evidence; it should be read with joint overlap and the approved product configuration. If a receiving check cannot reproduce the supplier\u2019s measurement condition, resolve the method before shipment. That is preferable to discovering at receipt that both parties have valid measurements of different states.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-3\">Material and Functional Evidence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tolerance chains deserve more attention than isolated nominal values. The relationship between net limb section and window opening includes the variation of both mating parts, any insulation or gasket, and the assembly method. For Hi-B core stack height, review the least favorable approved combination rather than assuming all parts arrive at nominal size. A trial fit should use representative production parts and preserve the identities of both sides of the interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One constraint on Hi-B core stack height is that rolling direction matters because grain-oriented steel is anisotropic. A cut list should preserve the intended magnetic path around the mitered joints rather than simply maximize sheet yield.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For Hi-B core stack height, coil access depends on the usable window and the assembly sequence. Review temporary lifting clearances and winding insertion before approving an external envelope alone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The recurring risk in this part of the Hi-B core stack height review is interlaminar shorts at cut edges. Ask which design input or manufacturing step controls it and which result would show that control has been effective. Keep the answer specific to Hi-B laminated core. A generic statement about quality management does not identify the material condition, fixture or production-stage evidence needed for this particular interface.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-4\">Comparing the Available Supply Approaches<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Treat a sample that fits as evidence about that sample. It does not prove that every allowed tolerance combination will fit. In a Hi-B core stack height trial, record the actual measured values, orientation and fixture, then compare them with the proposed acceptance range. If the supplier solves a mismatch by force or unrecorded rework, pause the approval until the cause and the revised dimensional basis are understood.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Approach<\/th><th>What must be confirmed<\/th><th>What it does not establish<\/th><\/tr><\/thead><tbody><tr><td>Higher-Permeability Grade With Unchanged Geometry<\/td><td>Approved interfaces, delivered state and required evidence<\/td><td>Automatic equivalence to another configuration<\/td><\/tr><tr><td>Revised Section With The Same Steel Grade<\/td><td>Any changed design or qualification work<\/td><td>An improvement in every operating condition<\/td><\/tr><tr><td>Supply As A Stacked Core<\/td><td>Tasks retained by the buyer and final inspection scope<\/td><td>A complete installed-performance guarantee<\/td><\/tr><tr><td>Supply As An Assembled And Restrained Core<\/td><td>Packing, assembly and acceptance responsibilities<\/td><td>The same total cost as a different supply boundary<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Use the table to align the supply boundary for Hi-B core stack height, then ask suppliers to state deviations explicitly. The alternatives shown are review routes, not a claim that every route is available for every Prennox product. Confirm the actual offered configuration and the customer\u2019s assembly capability before assigning a preference. If an alternative changes yoke joint, carry that difference into the drawing and acceptance schedule.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-5\">Inspection in the Delivered Condition<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When evaluating Hi-B core stack height, remember that the geometric section is not the net iron section. Lamination coating and small voids reduce the effective section; use the agreed stacking factor in design calculations instead of treating a height measurement as a complete magnetic specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a Hi-B core stack height review, an excitation-current result is meaningful with its voltage, frequency and connection. Compare data at the specified test condition, particularly when quotations refer to different national grade names.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02.jpg\" alt=\"Side view of a laminated transformer core and clamping frame\" class=\"wp-image-1375\" srcset=\"https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02.jpg 800w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02-300x300.jpg 300w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02-150x150.jpg 150w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02-768x768.jpg 768w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02-600x600.jpg 600w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/oil-immersed-transformer-iron_core-02-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For Hi-B core stack height, build the receiving record around item identity, requirement, method, condition, result and disposition. Add lamination width where it addresses the identified risk. Preserve the as-received state when distorted joints under uneven restraint is suspected, especially if further cutting, winding or assembly would conceal the evidence. A photograph can support the record, but it should not replace the agreed functional inspection.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-6\">A Worked Example and Its Limits<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Illustrative section calculation: take a geometric limb section of 82 mm \u00d7 103 mm, or 8,446 mm\u00b2. With an assumed stacking factor of 0.95, the screening net iron area is 8,023.7 mm\u00b2. These are invented teaching inputs, not Prennox dimensions or a design approval. For Hi-B core stack height, the calculation shows why an outer measurement and an effective magnetic section answer different questions. The actual designer must use the approved steel, stacking basis, turns, voltage and frequency before drawing a flux-density conclusion.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The calculation supports one limited part of Hi-B core stack height. It does not close the review of window opening, yoke joint or the final transformer duty. Replace every teaching input with the approved project value before using the result in a purchasing decision. Where the underlying relationship is only a screening approximation, record that scope so a preliminary estimate is not later reused as a production acceptance limit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A change to stack height can propagate into window opening, yoke joint and the inspection fixture. Review the affected assembly before approving a revised drawing. Keep the original requirement, proposed value and technical disposition visible so the next batch is built to the agreed configuration. For Hi-B core stack height, a handwritten workshop correction is useful investigation evidence but should not become the only manufacturing instruction.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-7\">Changes, Exceptions and Release Decisions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One constraint on Hi-B core stack height is that replacement cores must reproduce the approved magnetic and mechanical interfaces. Matching overall height and width does not establish that winding clearances, flux density or loss targets are preserved.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The useful outcome is a drawing that both supplier and buyer can inspect in the same way. Define the measurement state, accessible datums, limits and records for Hi-B core stack height; then close any mating-part assumptions before quantity production. That reduces argument at receipt and gives engineering a clear basis for deciding whether a measured deviation affects fit or requires further evaluation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If Hi-B core stack height remains unresolved, define the next evidence needed instead of broadening the acceptance wording. That may be a revised interface drawing, a representative process trial, a grade-specific statement or a result at the agreed test condition. Identify the affected batch and prevent an unresolved assumption from being copied into a repeat order. Once the evidence is available, record the technical disposition and the effective revision for production and receipt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-8\">Preparing a Technical Inquiry<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A useful Hi-B core stack height inquiry includes the exact product, quantity, approved drawing or grade, intended use and final supply state. Add requirements for stack height, lamination width and the evidence that addresses coil interference at the window. Define packing and destination information, and identify which assembly or processing stages remain with your plant. If an input is unknown, flag it as a question rather than presenting an invented value as an approved specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the product\u2019s stated supply scope, review <a href=\"https:\/\/prennox.com\/product\/hi-b-crgo-laminated-core-for-oil-immersed-transformers\/\">Hi-B CRGO Laminated Core for Oil-Immersed Transformers<\/a>. The related <a href=\"https:\/\/prennox.com\/transformer-core-drawing-requirements\/\">Transformer Core Drawing Requirements Before Ordering<\/a> provides broader context. The <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/63884\" target=\"_blank\" rel=\"noopener\">IEC magnetic-material specifications<\/a> is an independent reference for the relevant technical subject. Its public overview does not certify this product or provide all project acceptance limits; identify the applicable specification and edition in the order.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Send Prennox your drawing, application conditions and Hi-B core stack height questions through the <a href=\"https:\/\/prennox.com\/contact\/\">technical inquiry page<\/a> or the form below. Request confirmation of the offered configuration, required evidence and any proposed deviations before placing the order. This gives both teams a clear basis for a comparable quotation and an inspectable delivery.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-9\">Frequently Asked Questions<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-0-0\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">What information starts a Hi-B core stack height review?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Start with the approved Hi-B laminated core configuration, the relevant drawing revision and the condition being evaluated. Identify net limb section and stack height explicitly. Add the actual manufacturing or installation conditions so the supplier can distinguish confirmed requirements from assumptions.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-0-1\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can Hi-B core stack height be approved from a photograph?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>A photograph can show shape, orientation or visible damage. It cannot establish the complete magnetic, dielectric, thermal or mechanical performance of Hi-B laminated core. Use the agreed dimensional record, material identity and functional evidence for the requirement being accepted.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-0-2\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Which record is most useful for Hi-B core stack height?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The useful record connects the delivered item to the specific requirement. Include its batch or serial identity, drawing or grade revision, test or measurement condition and result. For this product, keep evidence concerning stack height visible alongside any source-material certificate.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-0-3\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">When does a Hi-B laminated core change need a new trial?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Review a change when it affects net limb section, the supplied material, the processing route or the previous acceptance basis. The extent of requalification depends on the affected function. A matching product name or nominal dimension does not by itself close that review.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-0-4\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">What should a quotation for Hi-B core stack height include?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Ask for the exact configuration, quantity, supply boundary, approved dimensions or performance, required documents, packing and delivery destination. State any unresolved value as a technical query. Prennox can review the listed product and project requirements before confirming the actual offered scope.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class='fluentform ff-default fluentform_wrapper_3 ffs_default_wrap'><form data-form_id=\"3\" id=\"fluentform_3\" class=\"frm-fluent-form fluent_form_3 ff-el-form-top ff_form_instance_3_1 ff-form-loading ffs_default\" data-form_instance=\"ff_form_instance_3_1\" method=\"POST\" ><fieldset  style=\"border: none!important;margin: 0!important;padding: 0!important;background-color: transparent!important;box-shadow: none!important;outline: none!important; min-inline-size: 100%;\">\n                    <legend class=\"ff_screen_reader_title\" style=\"display: block; margin: 0!important;padding: 0!important;height: 0!important;text-indent: -999999px;width: 0!important;overflow:hidden;\">\u5b98\u7f51\u8be2\u76d8\u8868\u5355<\/legend>        <div\n                style=\"display: none!important; position: absolute!important; transform: 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>Belarus<\/option><option value='BZ' >Belize<\/option><option value='BJ' >Benin<\/option><option value='BM' >Bermuda<\/option><option value='BT' >Bhutan<\/option><option value='BO' >Bolivia<\/option><option value='BQ' >Bonaire, Saint Eustatius v\u00e0 Saba<\/option><option value='BA' >Bosnia v\u00e0 Herzegovina<\/option><option value='BW' >Botswana<\/option><option value='BR' >Brazil<\/option><option value='BN' >Brunei<\/option><option value='BG' >Bulgaria<\/option><option value='BF' >Burkina Faso<\/option><option value='BI' >Burundi<\/option><option value='MK' >B\u1eafc Macedonia<\/option><option value='BE' >B\u1ec9<\/option><option value='PT' >B\u1ed3 \u0110\u00e0o Nha<\/option><option value='CI' >B\u1edd Bi\u1ec3n Ng\u00e0<\/option><option value='CV' >Cabo Verde<\/option><option value='CM' >Cameroon<\/option><option value='KH' >Campuchia<\/option><option value='CA' >Canada<\/option><option value='TD' >Chad<\/option><option value='CL' >Chile<\/option><option value='CO' >Colombia<\/option><option value='KM' >Comoros<\/option><option value='CR' >Costa Rica<\/option><option value='HR' >Croatia<\/option><option value='CU' >Cuba<\/option><option value='CW' >Cura\u00e7ao<\/option><option value='AE' >C\u00e1c Ti\u1ec3u v\u01b0\u01a1ng qu\u1ed1c \u1ea2 R\u1eadp Th\u1ed1ng nh\u1ea5t<\/option><option value='UM' >C\u00e1c \u0111\u1ea3o nh\u1ecf l\u1ebb xa x\u00f4i c\u1ee7a Hoa K\u1ef3 (M\u1ef9)<\/option><option value='CG' >C\u1ed9ng h\u00f2a Congo (Brazzaville)<\/option><option value='DO' >C\u1ed9ng h\u00f2a Dominica<\/option><option value='CD' >C\u1ed9ng h\u00f2a D\u00e2n ch\u1ee7 Congo (Kinshasa)<\/option><option value='CZ' >C\u1ed9ng h\u00f2a S\u00e9c<\/option><option value='CF' >C\u1ed9ng h\u00f2a Trung Phi<\/option><option value='DJ' >Djibouti<\/option><option value='DM' >Dominica<\/option><option value='EC' >Ecuador<\/option><option value='SV' >El Salvador<\/option><option value='ER' >Eritrea<\/option><option value='EE' >Estonia<\/option><option value='SZ' >Eswatini<\/option><option value='ET' >Ethiopia<\/option><option value='FJ' >Fiji<\/option><option value='GA' >Gabon<\/option><option value='GM' >Gambia<\/option><option value='GE' >Georgia<\/option><option value='GH' >Ghana<\/option><option value='GI' >Gibraltar<\/option><option value='GL' >Greenland<\/option><option value='GD' >Grenada<\/option><option value='GP' >Guadeloupe<\/option><option value='GU' >Guam<\/option><option value='GT' >Guatemala<\/option><option value='GG' >Guernsey<\/option><option value='GN' >Guinea<\/option><option value='GQ' >Guinea X\u00edch \u0111\u1ea1o<\/option><option value='GW' >Guinea-Bissau<\/option><option value='GY' >Guyana<\/option><option value='GF' >Guyane thu\u1ed9c Ph\u00e1p<\/option><option value='HT' >Haiti<\/option><option value='US' >Hoa K\u1ef3 (M\u1ef9)<\/option><option value='HN' >Honduras<\/option><option value='HU' >Hungary<\/option><option value='GR' >Hy L\u1ea1p<\/option><option value='NL' >H\u00e0 Lan<\/option><option value='KR' >H\u00e0n Qu\u1ed1c<\/option><option value='HK' >H\u1ed3ng K\u00f4ng<\/option><option value='IS' >Iceland<\/option><option value='ID' >Indonesia<\/option><option value='IR' >Iran<\/option><option value='IQ' >Iraq<\/option><option value='IE' >Ireland<\/option><option value='IL' >Israel<\/option><option value='JM' >Jamaica<\/option><option value='JE' >Jersey<\/option><option value='JO' >Jordan<\/option><option value='KZ' >Kazakhstan<\/option><option value='KE' >Kenya<\/option><option value='KI' >Kiribati<\/option><option value='XK' >Kosovo<\/option><option value='KW' >Kuwait<\/option><option value='KG' >Kyrgyzstan<\/option><option value='LV' >Latvia<\/option><option value='LB' >Lebanon<\/option><option value='LS' >Lesotho<\/option><option value='LR' >Liberia<\/option><option value='LY' >Libya<\/option><option value='LI' >Liechtenstein<\/option><option value='LT' >Lithuania<\/option><option value='LU' >Luxembourg<\/option><option value='LA' >L\u00e0o<\/option><option value='PS' >L\u00e3nh th\u1ed5 Palestine<\/option><option value='TF' >L\u00e3nh th\u1ed5 ph\u00eda Nam c\u1ee7a Ph\u00e1p<\/option><option value='IO' >L\u00e3nh th\u1ed5 \u1ea4n \u0110\u1ed9 D\u01b0\u01a1ng thu\u1ed9c Anh<\/option><option value='MO' >Ma Cao, Trung Qu\u1ed1c<\/option><option value='MG' >Madagascar<\/option><option value='MW' >Malawi<\/option><option value='MY' >Malaysia<\/option><option value='MV' >Maldives<\/option><option value='ML' >Mali<\/option><option value='MT' >Malta<\/option><option value='MQ' >Martinique<\/option><option value='MR' >Mauritania<\/option><option value='MU' >Mauritius<\/option><option value='YT' >Mayotte<\/option><option value='MX' >Mexico<\/option><option value='FM' >Micronesia<\/option><option value='MD' >Moldova<\/option><option value='MC' >Monaco<\/option><option value='ME' >Montenegro<\/option><option value='MS' >Montserrat<\/option><option value='MA' >Morocco<\/option><option value='MZ' >Mozambique<\/option><option value='MM' >Myanmar<\/option><option value='MN' >M\u00f4ng C\u1ed5<\/option><option value='NO' >Na Uy<\/option><option value='AQ' >Nam C\u1ef1c<\/option><option value='GS' >Nam Georgia v\u00e0 Qu\u1ea7n \u0111\u1ea3o Nam Sandwich<\/option><option value='ZA' >Nam Phi<\/option><option value='SS' >Nam Sudan<\/option><option value='NA' >Namibia<\/option><option value='NR' >Nauru<\/option><option value='NP' >Nepal<\/option><option value='NC' >New Caledonia<\/option><option value='NZ' >New Zealand<\/option><option value='RU' >Nga<\/option><option value='JP' >Nh\u1eadt B\u1ea3n<\/option><option value='NI' >Nicaragua<\/option><option value='NE' >Niger<\/option><option value='NG' >Nigeria<\/option><option value='NU' >Niue<\/option><option value='OM' >Oman<\/option><option value='PK' >Pakistan<\/option><option value='PW' >Palau<\/option><option value='PA' >Panama<\/option><option value='PG' >Papua New Guinea<\/option><option value='PY' >Paraguay<\/option><option value='PE' >Peru<\/option><option value='PH' >Philippines<\/option><option value='FR' >Ph\u00e1p<\/option><option value='FI' >Ph\u1ea7n Lan<\/option><option value='PN' >Pitcairn<\/option><option value='PF' >Polynesia thu\u1ed9c Ph\u00e1p<\/option><option value='PR' >Puerto Rico<\/option><option value='QA' >Qatar<\/option><option value='AX' >Qu\u1ea7n \u0111\u1ea3o Aland<\/option><option value='MP' >Qu\u1ea7n \u0111\u1ea3o B\u1eafc Mariana<\/option><option value='KY' >Qu\u1ea7n \u0111\u1ea3o Cayman<\/option><option value='CC' >Qu\u1ea7n \u0111\u1ea3o Cocos (Keeling)<\/option><option value='CK' >Qu\u1ea7n \u0111\u1ea3o Cook<\/option><option value='FK' >Qu\u1ea7n \u0111\u1ea3o Falkland<\/option><option value='FO' >Qu\u1ea7n \u0111\u1ea3o Faroe<\/option><option value='HM' >Qu\u1ea7n \u0111\u1ea3o Heard v\u00e0 McDonald<\/option><option value='MH' >Qu\u1ea7n \u0111\u1ea3o Marshall<\/option><option value='SB' >Qu\u1ea7n \u0111\u1ea3o Solomon<\/option><option value='TC' >Qu\u1ea7n \u0111\u1ea3o Turks v\u00e0 Caicos<\/option><option value='VG' >Qu\u1ea7n \u0111\u1ea3o Virgin thu\u1ed9c Anh<\/option><option value='VI' >Qu\u1ea7n \u0111\u1ea3o Virgin thu\u1ed9c Hoa K\u1ef3 (M\u1ef9)<\/option><option value='RO' >Romania<\/option><option value='RW' >Rwanda<\/option><option value='RE' >R\u00e9union<\/option><option value='BL' >Saint Barth\u00e9lemy<\/option><option value='SH' >Saint Helena<\/option><option value='KN' >Saint Kitts v\u00e0 Nevis<\/option><option value='LC' >Saint Lucia<\/option><option value='MF' >Saint Martin (thu\u1ed9c Ph\u00e1p)<\/option><option value='PM' >Saint Pierre v\u00e0 Miquelon<\/option><option value='VC' >Saint Vincent v\u00e0 Grenadines<\/option><option value='WS' >Samoa<\/option><option value='AS' >Samoa thu\u1ed9c M\u1ef9<\/option><option value='SM' >San Marino<\/option><option value='ST' >Sao Tome v\u00e0 Principe<\/option><option value='SN' >Senegal<\/option><option value='RS' >Serbia<\/option><option value='SC' >Seychelles<\/option><option value='SL' >Sierra Leone<\/option><option value='SG' >Singapore<\/option><option value='SX' >Sint Maarten (thu\u1ed9c H\u00e0 Lan)<\/option><option value='SK' >Slovakia<\/option><option value='SI' >Slovenia<\/option><option value='SO' >Somalia<\/option><option value='LK' >Sri Lanka<\/option><option value='SD' >Sudan<\/option><option value='SR' >Suriname<\/option><option value='SJ' >Svalbard v\u00e0 Jan Mayen<\/option><option value='SY' >Syria<\/option><option value='CY' >S\u00edp<\/option><option value='TJ' >Tajikistan<\/option><option value='TZ' >Tanzania<\/option><option value='TH' >Th\u00e1i Lan<\/option><option value='TR' >Th\u1ed5 Nh\u0129 K\u1ef3<\/option><option value='CH' >Th\u1ee5y S\u0129<\/option><option value='SE' >Th\u1ee5y \u0110i\u1ec3n<\/option><option value='TG' >Togo<\/option><option value='TK' >Tokelau<\/option><option value='TO' >Tonga<\/option><option value='TT' >Trinidad v\u00e0 Tobago<\/option><option value='KP' >Tri\u1ec1u Ti\u00ean<\/option><option value='CN' >Trung Qu\u1ed1c<\/option><option value='TN' >Tunisia<\/option><option value='TM' >Turkmenistan<\/option><option value='TV' >Tuvalu<\/option><option value='ES' >T\u00e2y Ban Nha<\/option><option value='EH' >T\u00e2y Sahara<\/option><option value='UG' >Uganda<\/option><option value='UA' >Ukraina<\/option><option value='UY' >Uruguay<\/option><option value='UZ' >Uzbekistan<\/option><option value='VU' >Vanuatu<\/option><option value='VA' >Vatican<\/option><option value='VE' >Venezuela<\/option><option value='VN' >Vi\u1ec7t Nam<\/option><option value='GB' >V\u01b0\u01a1ng qu\u1ed1c Anh (Anh)<\/option><option value='WF' >Wallis v\u00e0 Futuna<\/option><option value='YE' >Yemen<\/option><option value='ZM' >Zambia<\/option><option value='ZW' >Zimbabwe<\/option><option value='AT' >\u00c1o<\/option><option value='AU' >\u00dac<\/option><option value='IT' >\u00dd<\/option><option value='DK' >\u0110an M\u1ea1ch<\/option><option value='TW' >\u0110\u00e0i Loan<\/option><option value='TL' >\u0110\u00f4ng Timor<\/option><option 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