diamond content钻头: boring crown; bore bit; dril ...上: upper; up; upward金刚石: diamond; adamas; carbite; ad ...的: 4次方是 The fourth power of 2 i ...克拉: carat; karat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:钻头上金刚石的克拉数,即可在微信中查询翻译