He has to push down hard on the plunger, and the process is slow.
他不得不用力推挤针管，这个过程非常慢。
A plunger is mounted in the valve core.
柱塞安装在阀门的核心。
R2 is the point of signal transfer between plunger and barrel.
R2是顶针与套壳体之间的信号传输点。
When the well is shut-in, a plunger is dropped down the production string.
当关井时，柱塞沿生产管柱向下降落。
The balance valve circuit is to support the weight of platen and plunger design.
回路中的平衡阀是为支撑压板及柱塞的重量而设计的。
The balance valve circuit is to support the weight of platen and plunger design.
回路中的平衡阀是为支撑压板及柱塞的重量而设计的。
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