hole coverage钻头: boring crown; bore bit; dril ...牙齿: tooth; cusp与: take part in; participate in井底: shaft bottom; landing; pit b ...接触: come into contact with; get ...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:钻头牙齿与井底接触面积，即可在微信中查询翻译
