gumming of piston rings活塞圈: piston ring烧焦: charring; scorching; burns烧焦的活塞圈: gummed piston ring活塞圈: piston curl; piston packing活塞圈卡: piston ring joint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:活塞圈烧焦，即可在微信中查询翻译
