本规范涵盖八种型号的专用6吨战术两轮和四轮厢式半挂车，以下简称半挂车。半挂车主要用于在所有类型的道路和有限的越野地形上以及极端气候条件下运输和维修零件及车间设备（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.