钻头发热  driller exothermic

案头钻头虎钳  bench drill vise

侧钻钻头  side-tracking bit

冲击钻钻头  chopping bit

大型多钻头钻机  drill jumbo

导向扩钻钻头  bit life

顿钻钻头  cable tool bit; Cable system; bit breaker

尖头钻头  diamond point bit; Spud

金刚石钻头钻孔  diamond drill sample

埋头平头钻头  countersunk flat head bit

喷射钻头钻井  jet bit drilling

平头钻头  flat head bit

浅钻钻头  Spudding; bit spoon

曲柄钻钻头  brace bit

绳式顿钻钻头  cable bit

手钻钻头  gimlet bit

微钻头钻进试验  microbit drilling test

霰弹钻头钻机  pellet bit jetting drill

霰弹钻钻头  pellet impact bit

牙轮钻头钻进  roller boring; roller bit drilling