semi-coring bit半: half取: take; get; fetch心: the heart钻头: boring crown; bore bit; dril ...不取心钻头: blind bit; coreless bit; full-face bit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:半取心钻头，即可在微信中查询翻译
