| Master Air Waybill - (MAWB) |
 Air Waybill covering a consolidated consignment, showing the consolidator as shipper. |
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| Master Loader |
| The IATA agent who assumes the responsibility for contracting with other agents to assemble goods for consolidation to the airlines. |
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| MET - Merchandise Enforcement Team |
| A special unit of US Customs |
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| Minimum Charge |
| The minimum amount which applies for the transportation of air cargo service, no matter how small the shipment. |
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