本规范涵盖八种型号的专用6吨战术2轮和4轮厢式半挂车，此处称为半挂车。半挂车主要用于在所有类型的道路和有限的越野地形以及极端气候条件下运输和存放维修零件和车间设备（电气或机械）。

This specification covers eight models of special purpose 6 ton, tactical, 2- and 4-wheel van semitrailers, herein referred to as semitrailers. The semitrailers are used primarily to transport and house repair parts and shop equipment (electrical or mechanical) over all types of roads and limited cross-country terrain and under extreme climate conditions.