The deep well automatic vertical drilling tools positioning at thousands of meters, the hydraulic steering mechanism of them is demand of upper performances.
深井自动垂直钻井工具工作于数千米深的井下，对其上的液压导向机构的性能有较高的要求。
The deep well automatic vertical drilling tools positioning at thousands of meters, the hydraulic steering mechanism of them is demand of upper performances.
深井自动垂直钻井工具工作于数千米深的井下，对其上的液压导向机构的性能有较高的要求。
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