air driven hammer

常见例句

双语例句

• The air-driven down-hole hammer driven drilling is now one of higher-effect drilling methods in hard rocks.
  气功潜孔锤钻进是当前钻孔硬岩钻进效率较高的方法之一；
• 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。
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