传统牵引系统 0 至 9072 公斤（20000 磅）拖车最大总质量

[中文适用范围]： 本文件为牵引车与拖车之间牵引接口的常规牵引系统设定了最低性能标准，适用于拖车总重不超过9072千克（20000磅）的牵引系统。本标准不包括重量分配式挂钩。该标准为挂钩、拖车连接结构、连接件及牵引车连接结构设定了最低性能要求。本标准可作为选择相关产品时的法规参考。本文件旨在由相关产品制造商自愿采用。参见m [外文原描述]： This document establishes a minimum performance criteria for conventional towing systems for the towing interface between a tow vehicle and trailer up to 9072 kg (20000 pounds) Gross Trailer Weight Rating. This does not include weight distributing hitches. This creates the minimum performance criteria for the hitch, trailer attachment structure, coupling, and tow vehicle attachment structure. This standard may be used as a regulatory guide in the selection of products covered. This document is intended to be used voluntarily by the industry producing these products.