在垂直通孔的上端，设置有控制上火量的旋转控制阀。
The upper end of the vertical through hole is provided with a rotary control valve which controls the fire-feeding amount.
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.
T1 型装有底轴的旋转控制器是用来为普通控制阀服务的。
The QTCV-T1 trunnion-mounted rotary control valve designed for general control valve service.
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