Leakage rate: 12-hour pressure maintaining test.

泄漏率：12小时保压测试。

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Can realize the constant pressure, the two kinds of forming process, can be equipped with pressure maintaining time delay function, adjustable delay time.

可实现定压、定程两种成型工艺，可选配保压延时功能，延时时间可调。

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The key technique includes the contact vacuum starter, pressure maintaining equipment for vacuum, the safety control in the vacuum drainage, the design and calculation method for the vacuum drainage.

真空接触启动、真空保压设备、系统安全监控以及系统的设计计算是真空排水系统的技术关键。

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The Iraqi government is under pressure to prove that it is capable of maintaining security inside the country before the June 30 U.S.pull-back.

VOA: standard.2009.06.01

We tend to think about a stressed out workforce as one that is under the pressure of maintaining a declining business with fewer resources, amidst business model change or one struggling to hold onto legacy revenues.

FORBES: 5 Questions to 'Self-Check' for Team Burn Out

Intervening at shorter maturities is another way of maintaining pressure: countries prefer to borrow for longer to avoid having to roll over debt too often.

ECONOMIST: The European Central Bank

In a statement Derry City Football Club chairman Pat McDaid said they were confident about maintaining pressure on the relevant bodies to reach their goal.

BBC: Stadium application 'ineligible'