本推荐规程适用于配有空气盘式制动器且车辆额定总重大于4536 kg的商用车。与磨损、耐久性、与产品寿命的相关性、噪音、抖动、是否符合特定法规等相关的摩擦材料或转子的其他评估不属于本RP（推荐规程）的一部分。

This Recommended Practice applies to commercial vehicles equipped with air disc brakes and above 4536 kg of Gross Vehicle Weight Rating. Other assessments on the friction material or rotor related to wear, durability, correlation to product life, noise, judder, compliance to specific regulations, etc., are not part of this RP (Recommended Practice).