check (or jam, or lock) nut帽: cap; hat; helmet; headgear并: combine; merge; incorporate; ...紧: taut; tight螺帽: blind nut; nut锁紧螺帽, 薄螺帽: lock unt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:帽,并紧螺帽，即可在微信中查询翻译
