countersinking bitflat head bit平头: crew cut钻头: boring crown; bore bit; dril ...埋头平头钻头: countersunk flat head bit平头钻: counter bore; flat head bit; spotfacing埋头孔,平头钻: counter bore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:平头钻头，即可在微信中查询翻译
