The optimized holding pressure is in the middle of the maximum and minimum normally.

优化的保压压力一般为最低保压压力和最高保压压力的中间值。

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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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The use of automatic hydraulic operation, which can be used for pressure relief valve can also be used as a holding pressure valve.

利用水力自动操作，即可以作泄压阀用又可作持压阀用。

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Najafi was asked by a reporter about reports U.S.special envoy Richard Holbrooke is trying to pressure the Afghan government into holding a second round to alleviate concerns of widespread voter fraud.

VOA: standard.2009.08.29

EU's competition directorate is holding off similar pressure for the moment.

ECONOMIST: Internet telephony

High beta tech stocks remain under pressure despite AAPL holding up well in the pre-market.

FORBES: Stocks Need A Boost From Apple And Bernanke

The acquisition of a major German firm by an American holding could relieve some of that pressure.

FORBES: HP: What Will They Buy Next?