本SAE标准提供了额定车辆总重超过4536 kg（10000磅）的公路商用车辆用气动和气动液压盘式或鼓式制动器的试验程序。本推荐规程包括联邦机动车安全标准TP-121D-01的通过/失败标准。

This SAE Standard provides test procedures for air and air-over-hydraulic disc or drum brakes used for on-highway commercial vehicles over 4536 kg (10000 pounds) GVWR. This recommended practice includes the pass/fail criteria of Federal Motor Vehicle Safety Standard No. TP-121D-01.