本标准规定了流体动力气缸、泵和阀门中使用的径向压缩型活塞环槽的尺寸、公差和表面光洁度要求，以确保径向压缩型活塞环的正确性能。规定的槽宽不适用于推荐的其他防挤压装置。

This standard specifies dimensions, tolerances and surface finish requirements for grooves for radial compression type piston rings used in fluid power cylinders, pumps and valves, to assure proper performance of radial compression type piston rings. The groove widths specified will not accommodate additional anti-extrusion devices that may be recommended.