square nut方: square螺母: nut source; origin; parent粗制方螺母: black square nut; blacksquarenut焊接方螺母: square weld nuts方螺帽: square nut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:方螺母，即可在微信中查询翻译
