insert nuts内外: inside and outside; domestic ...牙: tooth螺母: nut source; origin; parent拉: cut; slash; slit帽: cap; hat; helmet; headgear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:内外牙螺母(拉帽),即可在微信中查询翻译