A research was made on the structure of piston ring and elastic force ring in oilless lubrication compressors.

对全无油压缩机上活塞环弹力环结构进行了研究。

youdao

A research was made on the structure of piston ring and elastic force ring in oilless lubrication compressors.

对全无油压缩机上活塞环弹力环结构进行了研究。

youdao