countersunk external toothed lock washer for assembly组合: make up; compose; constitute件: piece; article; item用: 40分钟跑完全程 run the course in 4 ...锥形: taper; cone; cone-shape锁紧垫圈: lock washer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:组合件用锥形锁紧垫圈，即可在微信中查询翻译
