标准摘要
[中文适用范围]： 本 SAE 推荐做法适用于用于非公路作业或牵引重物的重型商用拖车和半拖车@的第五轮主销（见图 1）。 [外文原描述]： This SAE Recommended Practice applies to fifth wheel kingpins for heavy-duty commercial trailers and semitrailers, used for off-highway operation or in hauling heavy loads (see Figure 1 ).Cross Reference:
英文名称Fifth Wheel Kingpin, Heavy Duty - Commercial Trailers and Semitrailers