An invariableness pressure decompression valve is added to common PCM to keep pressure discrepancy invariable approximately.

在原有PCM流量控制阀组中加上一个定差减压阀，使压力差近似保持定值。

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Based on the detailed reliability analysis for common pressure relay, two methods were proposed to reliably keep pressure relay work.

对普通压力继电器的可靠性进行了详细分析，提出了保证压力继电器工作可靠的两种措施。

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A single - direction valve controlled by liquid, an accumulator and hydraulic pumps can be used to keep pressure in hydraulic systems.

液压系统可以采用液控单向阀、蓄能器、液压泵等多种形式实现保压。

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And the president made clear he will keep pressure on the Karzai government to deliver on its promises.

VOA: standard.2009.11.02

On the other hand, temperature, volume and pressure are variables that are much easier in the lab to keep constant.

另一方面，温度，体积和压强,在实验室中比较容易保持恒定。

麻省理工公开课 - 热力学与动力学课程节选

If I keep the pressure constant.

当我保持压强恒定。

麻省理工公开课 - 热力学与动力学课程节选

Rewarding those who have broken the law would encourage others to break the law and keep pressure on our border.

NPR: Bush Promotes Immigration Reform

Meanwhile, gun-control advocates vowed to keep pressure on lawmakers to enact changes.

WSJ: Background-Check Gun Measure Fails in the Senate

That will keep pressure on Palm and others to follow its lead.

FORBES: Magazine Article