阀体类型可钻孔的全凸耳或对夹式。
在煤层中使用该纠偏技术，在保证钻孔质量的同时，可极大地降低近水平孔钻进纠偏成本。
It will greatly reduce the cost on rectifying the deviation of the drilling and ensure the drilling quality.
介绍了一种实用的液压振动钻孔装置。该装置安装在车床尾座上，可实现振动钻孔。
This paper introduces the developing process of an actual hydraulic vibration drilling apparatus, which is installed on a lathe tailstock to achieve the vibration drilling.
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