Drill string resonance is the major cause of drill tool failure.

钻柱共振是引起深井钻具失效的主要原因。

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The failure of collar connection thread is one of the prime drill tool failures.

石油钻铤螺纹联接失效是钻具失效的主要类型。

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The air screw drill tool was power equipment which was designed for air drilling.

空气螺杆钻具是专为空气钻井而设计的动力装置。

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Curiosity is building towards using its hammer-drill, the last major tool yet to be deployed on the mission.

BBC: Curiosity Mars rover deploys its rock brush

This is positioned on the same tool-turret as the drill, on the end of the robotic arm.

BBC: Curiosity Mars rover spins its rock drill

So, the command was given to drill a second hole that was deep enough to push some cuttings into the tool's sample acquisition chamber.

BBC: Curiosity Mars rover takes historic drill sample