If you cannot test geothermal heating principle to the construction, and the ground is absolutely not allowed to drill hammer and hammer nails, to prevent the destruction of the heating coil.

如果无法进行地热加温试验原则上不给施工，而且地上绝对不允许电锤打眼和锤钉，防止破坏加热盘管。

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You only need basic carpentry skills for framing and one special tool-a hammer drill for concrete fasteners.

你只需要一些基本的木工技能和一把特别的工具：打水泥紧固件的钻机。

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Here is the detailed instruction: All you need is a hammer, drill, tubes and a bottle for SAP.

下面介绍具体步骤：所需工具为锤子、电钻、导管和用来装桦树汁的瓶子。

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Sougarret said the drill hammer had been swapped out but hit fresh problems after running into rock that was tougher than expected.

CNN: STORY HIGHLIGHTS

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

He said the drill diameter would be reduced from 28 inches to 26 inches until the hammer had cleared the hard rock but added that the slightly smaller diameter would not cause problems for the rescue.

CNN: STORY HIGHLIGHTS