{"id":1999,"date":"2026-10-23T08:00:00","date_gmt":"2026-10-23T08:00:00","guid":{"rendered":"https:\/\/prennox.com\/?p=1999"},"modified":"2026-10-16T03:56:25","modified_gmt":"2026-10-16T03:56:25","slug":"flujo-de-aire-central-tipo-seco","status":"publish","type":"post","link":"https:\/\/prennox.com\/es\/dry-type-core-airflow\/","title":{"rendered":"Flujo de aire del n\u00facleo de tipo seco: mantener los marcos libres de v\u00edas de enfriamiento"},"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\">Dry-Type Core Airflow: The Decision to Resolve<\/a><\/li><li class=\"\"><a href=\"#section-2\">Coil Inner Opening 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 product can meet its own data sheet and still be unsuitable for a particular assembly. For the specified dry-type laminated core, the interaction between coil inner opening and air cooling passage determines how the item performs in use. The dry-type core airflow decision therefore begins with the installation or manufacturing conditions that the customer can actually define.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A dry-type laminated core operates inside an air-cooled transformer structure. Its magnetic behavior, mechanical restraint and relationship to the cast or wound coils must be reviewed as one assembly. This article concentrates on dry-type core airflow, with practical checks for engineering, purchasing and incoming inspection.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-1\">Dry-Type Core Airflow: The Decision to Resolve<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Describe the real operating or assembly environment for dry-type core airflow. Identify the adjacent part, access route, expected processing and any relevant ambient or electrical condition. Translate those facts into controlled requirements for window height and frame envelope. Do not expect the supplier to infer a missing design input from the industry name or the nominal transformer rating.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For dry-type core airflow, air passages are part of the thermal layout. A frame or shipping bracket that intrudes into the intended route can affect cooling even when it does not touch a live conductor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When evaluating dry-type core airflow, remember that site altitude and ambient conditions affect transformer thermal and dielectric design. The core supplier should receive the resulting geometry and performance requirements rather than infer them from the building location.<\/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\/crgo-dry-type-transformer-core-01.jpg\" alt=\"Laminated core and support frame for a dry-type transformer\" class=\"wp-image-1380\" srcset=\"https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-core-01.jpg 800w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-core-01-300x300.jpg 300w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-core-01-150x150.jpg 150w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-core-01-768x768.jpg 768w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-core-01-600x600.jpg 600w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-core-01-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"section-2\">Coil Inner Opening and the Adjacent Interface<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The dry-type core airflow requirement sits between coil inner opening and air cooling passage. 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 packet identification 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 dry-type core airflow review, access for lifting and later maintenance must be considered alongside the installed envelope. A core that fits after assembly may still be difficult to position without damaging adjacent coils.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For dry-type core airflow, distinguish the physical feature from the property being evaluated. Window height is one part of the evidence; it should be read with frame envelope 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\">Check the interfaces in their installed state. The position of insulated core frame can affect access, processing or inspection even when it is not the headline item on the order. For dry-type core airflow, review the assembly sequence and the final layout together. A component that fits once the assembly is complete may still be impossible to install without damaging a neighboring part.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One constraint on dry-type core airflow is that frame dimensions should reference the same datum system as the coil drawing. Center distances, mounting holes and vertical clearances are more useful when they can be checked from an accessible assembly surface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For dry-type core airflow, the magnetic path should remain clean and free of unintended metallic debris. Fasteners, swarf and temporary assembly straps deserve explicit removal checks before coil assembly is closed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The recurring risk in this part of the dry-type core airflow review is restricted natural airflow. Ask which design input or manufacturing step controls it and which result would show that control has been effective. Keep the answer specific to dry-type 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\">A representative application trial should include the relevant surrounding parts and process. For dry-type core airflow, use the actual orientation, mounting or winding route where practical and record any differences from production. A free-standing sample demonstrates less about an enclosed or restrained assembly; identify that limitation when deciding how far the trial result can be generalized.<\/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>Stacked Core For Assembly At The Coil Plant<\/td><td>Approved interfaces, delivered state and required evidence<\/td><td>Automatic equivalence to another configuration<\/td><\/tr><tr><td>Preassembled Core And Frame<\/td><td>Any changed design or qualification work<\/td><td>An improvement in every operating condition<\/td><\/tr><tr><td>Revised Window For Coil Geometry<\/td><td>Tasks retained by the buyer and final inspection scope<\/td><td>A complete installed-performance guarantee<\/td><\/tr><tr><td>Revised Restraint With The Same Magnetic Section<\/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 dry-type core airflow, 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 insulated core frame, 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 dry-type core airflow, remember that the coil opening needs allowances for manufacturing tolerances, insulation and assembly tooling. A theoretical fit in a drawing can fail during insertion if the coil and core are both at their limiting dimensions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a dry-type core airflow review, where laminations are temporarily removed for coil insertion, preserve their identification and sequence. Reassembly quality needs the same care as the original stack.<\/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\/crgo-dry-type-transformer-iron_core-02.jpg\" alt=\"Dry-type transformer core with a blue clamping assembly\" class=\"wp-image-1381\" srcset=\"https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-iron_core-02.jpg 800w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-iron_core-02-300x300.jpg 300w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-iron_core-02-150x150.jpg 150w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-iron_core-02-768x768.jpg 768w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-iron_core-02-600x600.jpg 600w, https:\/\/prennox.com\/wp-content\/uploads\/2026\/09\/crgo-dry-type-transformer-iron_core-02-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For dry-type core airflow, build the receiving record around item identity, requirement, method, condition, result and disposition. Add limb center distance where it addresses the identified risk. Preserve the as-received state when coil-to-frame interference 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 dry-type core airflow, 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 dry-type core airflow. It does not close the review of air cooling passage, insulated core frame 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\">An application change can invalidate an earlier material or component approval. Review a different neighboring part, enclosure, process temperature or handling method against coil inner opening and earthing connection. The dry-type core airflow file should state which conditions were approved and which new conditions need evaluation. Reusing a previous purchase order is reasonable only when the technical basis still applies.<\/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 dry-type core airflow is that repeat orders need a controlled drawing revision. Small changes in the customer coil supplier, clamp insulation or mounting arrangement can make an old approved core layout unsuitable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A good application specification gives the supplier enough context to propose a compatible configuration and gives the buyer a way to verify it. For dry-type core airflow, close the critical interface, trial and operating assumptions before committing to a large batch. The approved transformer design remains the basis for performance; a component description is useful supporting information rather than a complete system calculation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If dry-type core airflow 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 dry-type core airflow inquiry includes the exact product, quantity, approved drawing or grade, intended use and final supply state. Add requirements for window height, limb center distance and the evidence that addresses unintended conductive loops. 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\/crgo-laminated-core-for-dry-type-transformers\/\">CRGO Laminated Core for Dry-Type 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 dry-type core airflow 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 dry-type core airflow review?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Start with the approved dry-type laminated core configuration, the relevant drawing revision and the condition being evaluated. Identify coil inner opening and window 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 dry-type core airflow 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 dry-type 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 dry-type core airflow?<\/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 window 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 dry-type laminated core change need a new trial?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Review a change when it affects coil inner opening, 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 dry-type core airflow 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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>Bahrain<\/option><option value='BD' >Bangladesh<\/option><option value='BB' >Barbados<\/option><option value='BZ' >Belize<\/option><option value='BJ' >Benin<\/option><option value='BM' >Bermuda<\/option><option value='BT' >Bhutan<\/option><option value='BY' >Bielorrusia<\/option><option value='MM' >Birmania<\/option><option value='BO' >Bolivia<\/option><option value='BQ' >Bonaire, San Eustaquio y Saba<\/option><option value='BA' >Bosnia y Herzegovina<\/option><option value='BW' >Botswana<\/option><option value='BR' >Brasil<\/option><option value='BN' >Brun\u00e9i<\/option><option value='BG' >Bulgaria<\/option><option value='BF' >Burkina Faso<\/option><option value='BI' >Burundi<\/option><option value='BE' >B\u00e9lgica<\/option><option value='CV' >Cabo Verde<\/option><option value='KH' >Camboya<\/option><option value='CM' >Camer\u00fan<\/option><option value='CA' >Canad\u00e1<\/option><option value='TD' >Chad<\/option><option value='CL' >Chile<\/option><option value='CN' >China<\/option><option value='CY' >Chipre<\/option><option value='VA' >Ciudad del Vaticano<\/option><option value='CO' >Colombia<\/option><option value='KM' >Comoras<\/option><option value='KP' >Corea del Norte<\/option><option value='KR' >Corea del Sur<\/option><option value='CR' >Costa Rica<\/option><option value='CI' >Costa de Marfil<\/option><option value='HR' >Croacia<\/option><option value='CU' >Cuba<\/option><option value='CW' >Curazao<\/option><option value='DK' >Dinamarca<\/option><option value='DJ' >Djibouti<\/option><option value='DM' >Dominica<\/option><option value='EC' >Ecuador<\/option><option value='EG' >Egipto<\/option><option value='SV' >El Salvador<\/option><option value='AE' >Emiratos \u00c1rabes Unidos<\/option><option value='ER' >Eritrea<\/option><option value='SK' >Eslovaquia<\/option><option value='SI' >Eslovenia<\/option><option value='ES' >Espa\u00f1a<\/option><option value='VI' >Estados Unidos (EE.UU.) Islas V\u00edrgenes<\/option><option value='US' >Estados Unidos (EEUU)<\/option><option value='EE' >Estonia<\/option><option value='SZ' >Esuatini<\/option><option value='ET' >Etiop\u00eda<\/option><option value='PH' >Filipinas<\/option><option value='FI' >Finlandia<\/option><option value='FJ' >Fiyi<\/option><option value='FR' >Francia<\/option><option value='GA' >Gab\u00f3n<\/option><option value='GM' >Gambia<\/option><option value='GE' >Georgia<\/option><option value='GH' >Ghana<\/option><option value='GI' >Gibraltar<\/option><option value='GD' >Granada<\/option><option value='GR' >Grecia<\/option><option value='GL' >Groenlandia<\/option><option value='GP' >Guadalupe<\/option><option value='GU' >Guam<\/option><option value='GT' >Guatemala<\/option><option value='GF' >Guayana Francesa<\/option><option value='GG' >Guernsey<\/option><option value='GN' >Guinea<\/option><option value='GQ' >Guinea Ecuatorial<\/option><option value='GW' >Guinea-Bis\u00e1u<\/option><option value='GY' >Guyana<\/option><option value='HT' >Hait\u00ed<\/option><option value='HN' >Honduras<\/option><option value='HK' >Hong Kong<\/option><option value='HU' >Hungr\u00eda<\/option><option value='IN' >India<\/option><option value='ID' >Indonesia<\/option><option value='IQ' >Irak<\/option><option value='IE' >Irlanda<\/option><option value='IR' >Ir\u00e1n<\/option><option value='BV' >Isla Bouvet<\/option><option value='NF' >Isla Norfolk<\/option><option value='SH' >Isla Santa Elena<\/option><option value='IM' >Isla de Man<\/option><option value='CX' >Isla de Navidad<\/option><option value='IS' >Islandia<\/option><option value='AX' >Islas Aland<\/option><option value='KY' >Islas Caim\u00e1n<\/option><option value='CC' >Islas Cocos<\/option><option value='CK' >Islas Cook<\/option><option value='FO' >Islas Feroe<\/option><option value='GS' >Islas Georgias y Sandwich del Sur<\/option><option value='HM' >Islas Heard y McDonald<\/option><option value='FK' >Islas Malvinas<\/option><option value='MP' >Islas Marianas del Norte<\/option><option value='MH' >Islas Marshall<\/option><option value='SB' >Islas Salom\u00f3n<\/option><option value='TC' >Islas Turcas y Caicos<\/option><option value='VG' >Islas V\u00edrgenes Brit\u00e1nicas<\/option><option value='UM' >Islas de ultramar menores de Estados Unidos (EEUU)<\/option><option value='IL' >Israel<\/option><option value='IT' >Italia<\/option><option value='JM' >Jamaica<\/option><option value='JP' >Jap\u00f3n<\/option><option value='JE' >Jersey<\/option><option value='JO' >Jordania<\/option><option value='KZ' >Kazajist\u00e1n<\/option><option value='KE' >Kenia<\/option><option value='KG' >Kirguist\u00e1n<\/option><option value='KI' >Kiribati<\/option><option value='XK' >Kosovo<\/option><option value='KW' >Kuwait<\/option><option value='LA' >Laos<\/option><option value='LS' >Lesoto<\/option><option value='LV' >Letonia<\/option><option value='LR' >Liberia<\/option><option value='LY' >Libia<\/option><option value='LI' >Liechtenstein<\/option><option value='LT' >Lituania<\/option><option value='LU' >Luxemburgo<\/option><option value='LB' >L\u00edbano<\/option><option value='MO' >Macao<\/option><option value='MK' >Macedonia del Norte<\/option><option value='MG' >Madagascar<\/option><option value='MY' >Malasia<\/option><option value='MW' >Malaui<\/option><option value='MV' >Maldivas<\/option><option value='MT' >Malta<\/option><option value='ML' >Mal\u00ed<\/option><option value='MA' >Marruecos<\/option><option value='MQ' >Martinica<\/option><option value='MU' >Mauricio<\/option><option value='MR' >Mauritania<\/option><option value='YT' >Mayotte<\/option><option value='FM' >Micronesia<\/option><option value='MD' >Moldavia<\/option><option value='MN' >Mongolia<\/option><option value='ME' >Montenegro<\/option><option value='MS' >Montserrat<\/option><option value='MZ' >Mozambique<\/option><option value='MX' >M\u00e9xico<\/option><option value='MC' >M\u00f3naco<\/option><option value='NA' >Namibia<\/option><option value='NR' >Nauru<\/option><option value='NP' >Nepal<\/option><option value='NI' >Nicaragua<\/option><option value='NG' >Nigeria<\/option><option value='NU' >Niue<\/option><option value='NO' >Noruega<\/option><option value='NC' >Nueva Caledonia<\/option><option value='NZ' >Nueva Zelanda<\/option><option value='NE' >N\u00edger<\/option><option value='OM' >Om\u00e1n<\/option><option value='PK' >Pakist\u00e1n<\/option><option value='PW' >Palaos<\/option><option value='PA' >Panam\u00e1<\/option><option value='PG' >Pap\u00faa Nueva Guinea<\/option><option value='PY' >Paraguay<\/option><option value='NL' >Pa\u00edses Bajos<\/option><option value='PE' >Per\u00fa<\/option><option value='PN' >Pitcairn<\/option><option value='PF' >Polinesia Francesa<\/option><option value='PL' >Polonia<\/option><option value='PT' >Portugal<\/option><option value='PR' >Puerto Rico<\/option><option value='QA' >Qatar<\/option><option value='GB' >Reino Unido (UK)<\/option><option value='CF' 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Luc\u00eda<\/option><option value='ST' >Santo Tom\u00e9 y Pr\u00edncipe<\/option><option value='SN' >Senegal<\/option><option value='RS' >Serbia<\/option><option value='SC' >Seychelles<\/option><option value='SL' >Sierra Leona<\/option><option value='SG' >Singapur<\/option><option value='SY' >Siria<\/option><option value='SO' >Somalia<\/option><option value='LK' >Sri Lanka<\/option><option value='ZA' >Sud\u00e1frica<\/option><option value='SD' >Sud\u00e1n<\/option><option value='SS' >Sud\u00e1n del Sur<\/option><option value='SE' >Suecia<\/option><option value='CH' >Suiza<\/option><option value='SR' >Surinam<\/option><option value='SJ' >Svalbard y Jan Mayen<\/option><option value='TH' >Tailandia<\/option><option value='TW' >Taiw\u00e1n<\/option><option value='TZ' >Tanzania<\/option><option value='TJ' >Tayikist\u00e1n<\/option><option value='IO' >Territorio Brit\u00e1nico del Oc\u00e9ano \u00cdndico<\/option><option value='PS' >Territorios Palestinos<\/option><option value='TF' 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