标准摘要
[中文适用范围]： GB／T 20421的本部分描述了测定 这是两种相似的测量方法，恒转矩法(见第6章）和恒压力法(见第7章)。由于获得的结果是相同 的，所以两种方法没有优劣之分。 在附录A中给出附加物理量及字母符号的说明。 测量的准确度划分A、B、C 三个等级， 在附录B中给出说明 [外文原描述]： This part of ISO 4392 specifies two test methods for determining the startability of rotary hydraulic motors. It describes two comparable methods of measurement, namely the constant torque method and the constant pressure method. Since the results obtained by these two methods are equivalent, no preference is given to either.
英文名称Hydraulic fluid power — Determination of characteristics of motors — Part 2: Startability