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1·Then I felt the numbing pain of the auger bit crushing my back.

然后，钻孔机钻头压断了我的后背，我痛的几乎麻木了。

2·8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, DTH hammer drilling, follow - up casing drilling, etc. 3.

钻机可适用多种钻进工艺方法，如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。