piston ring joint活塞圈: piston ring卡: wedge; get stuck; be jammed活塞圈: piston curl; piston packing活塞圈磨损: galling of rings活塞圈末端: ends of piston ring下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:活塞圈卡，即可在微信中查询翻译
