衬环ring: vt. (rang rung ) 1.鸣,敲(钟),摇( ...expander type ring: 撑胀器活塞环piston ring expander: 活塞衬环; 活塞环撑张器; 活塞环撑涨器; 活塞扩环器ring with coil spring expander: 螺旋弹簧胀圈活塞环ring with coil-spring expander: 螺旋弹簧胀圈活塞环下载手机词典可随时随地查词查翻译