hammer drilling meaning in English

冲击式凿岩

Hammer drilling ; connecting tap for hammer drilling support
冲击钻.冲击钻支座用连接锤头
Masonry drills . tapers of hammer drills
砖石砌工用钻机.风钻的锥度
Carbide alloy electric hammer drill
硬质合金电锤钻头
Sds - plus shak electric hammer drill
二坑圆柄电锤钻
Masonry drills , with hard metal tips . hammer drills . characteristics
建筑用硬金属钻头钻.冲击钻头式钻机.特性

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