A pressure relief valve from the main valve, pressure relief / holding pressure pilot valve needle valve, ball valve, micro shaped filter and pressure gauge hydraulic control over the system.
进口持压泄压阀由主阀、泄压/持压导阀针阀、 、 球阀、微形过滤器和压力表组成水力控制接管系统。
An approximate PVT control making pressure to decrease proportionally to time is adopted for holding pressure.
在保压阶段采用了压力随时间成正比下降的近似PVT控制。
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