N a rock drill operated by compressed air in which the boring bit is not attached to the reciprocating piston 冲击式钻机; 钻片不在摆动的活塞之上,通过压缩空气操作的岩石钻机
Hiti te-9 hammer drill (or equivalent) for each bay.
为每个海湾的Hiti te - 9槌钻孔机(或同等物)。
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。
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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