hand drilling hammer 手动穿孔锤
air hammer drilling 气动震击钻井 ; 空气锤钻井英文课件 ; 空气锤钻井
Down hole hammer drilling 潜孔锤钻进
hand-hammer drilling 手工凿岩
drilling g hammer 钻机冲锤
Hammer drilling 手提凿岩机
dth hammer drilling 空气潜孔锤钻进
spark hammer drilling 电火花潜孔锤钻进
hydro-hammer drilling 液动潜孔锤钻进
Water well drillers may specialize in a specific method of drilling, such as cable, rotary, auger, hammer or reverse circulation drilling.
水井钻井工可能会专注于一个特定的钻探方法，如电缆，旋转，钻，锤或反向循环钻探。
The air-driven down-hole hammer drilling is still very effective and speedy in well drilling in karst limestone area.
在水文水井中，气动潜孔锤钻进仍可发挥它高效率、高速度的作用。
This paper discusses the rock crushing mechanism of DTH hammer drilling and factor influencing the effect of DTH hammer broken rock.
本文论述了潜孔锤钻进的岩石破碎机理以及影响潜孔锤碎岩效果的因素。
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