取心钻头 meaning in English

core drilling bit
core head
coring bit
coring crown
rock core bit

Diamond drilling bits and diamond core bits
金刚石钻头及金刚石取心钻头
Polycrystalline diamond compact non - core bit
金刚石复合片不取心钻头
Polycrystalline diamond compact core bit
金刚石复合片取心钻头
Diamond core bit for coal drilling
煤田钻探金刚石取心钻头
Researches and applications of compound diamond core bit with sintered body
混合型金刚石烧结体取心钻头的研制及应用