Large torsion hydraulic boring machine, cutter heads and cutters are chosen and suitable boring procedures are well prepared, thus good effects have been achieved in the construction.
经选用合理的大扭矩液压钻机、刀盘和刀具并制定合适的钻孔工艺，在施工中取得良好的效果。
Large torsion hydraulic boring machine, cutter heads and cutters are chosen and suitable boring procedures are well prepared, thus good effects have been achieved in the construction.
经选用合理的大扭矩液压钻机、刀盘和刀具并制定合适的钻孔工艺，在施工中取得良好的效果。
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