One of the key problems of designing the control valve of modulation rotary steering drilling tool is the design of high pressure hole of upside valve.
设计调制式旋转导向钻井工具控制阀的关键问题之一是上盘阀高压孔的设计。
One of the key problems of designing the control valve of modulation rotary steering drilling tool is the design of high pressure hole of upside valve.
设计调制式旋转导向钻井工具控制阀的关键问题之一是上盘阀高压孔的设计。
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