drilling variable
... 钻井驳船：drilling barge,drilling scow,barge unit 钻井变量：drilling variable 钻井报表：driller's report ...
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液压驱动的钻井泵采用变量液压泵和动力油缸组成液压钻井泵的动力端；液力端和现在使用的三缸单作用活塞式钻井泵相同。
Hydraulic dive drilling pump adopts variable hydraulic pump and dynamic cylinder as its power end and its fluid end is identical with the triplex single acting piston pump.
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