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。
The technology and the die design of cold extruding for the electric hammer drill is described.
介绍了电锤钻头冷挤压工艺及模具设计。
According to the exploration problems in an open-pit mine, a new drilling method using reverse circulation DTH hammer drill is put forward.
针对露天矿钻探施工中存在的问题，提出了利用贯通式反循环潜孔锤进行施工的新方法。
Elements of stonework excavation: Use down-hole drill assisted with hammer drill drilling. Control blasting loosely and side slope molding smoothing wall blasting.
石方开挖施工要点：采用潜孔钻机配以凿岩机钻眼，松动控制爆破和边坡成型光面爆破。
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。
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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