规定了道路车辆上使用的主缸储液罐隔膜垫圈的性能要求和试验方法。这些垫圈提供密封和保护，防止水和来自外部的污染。包含测试分类、物理要求和测试程序。

Specifies performance requirements and test methods for diaphragm gaskets of master cylinder reservoirs to be used on road vehicles. These gaskets provide a seal and protection against water and contamination from external sources. Contains classification of tests, physical requirements, and test procedures.