Fluid in the labyrinth seal flow process, to follow all the control of fluid flow equation.
流体在迷宫密封内的流动过程，遵循流体流动的所有控制方程。
A downhole device used to control fluid flow under downhole conditions.
用于在井下条件下控制流体流动的井下装置。
Can be used for both on-off and throttling control of fluid flow.
可用作流体流量的启闭和节流控制。
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