... 钻杆规格Drill Specifications (mm) 钻孔倾角度Inclined angle drill(°) 动力头额定输出扭拒Rated torque rejection(N.m) ...
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inclined angle drill
斜角钻
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On the contrary, the back well drill method is from bottom to top, which is suitable for the small inclined Angle, but not for the large shaft section.
反井法施工斜井为自下而上进行,适合倾角不大的斜井施工,但不适宜运用于断面较大的斜井。
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