The performance and structure of existing back valve are introduced, and an ultra-low pressure startup back valve, which can be fixed freely in any pipes with any directions, is designed.

对现有止回阀的性能、结构进行了分析，设计了一种可以随意安装于各种方向的管道中的超低压力启动上回阀。

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Caution: Exercise care to prevent purple primer or solvent cement from running back in the valve to the diaphragm or seating area.

警告：要小心谨慎操作，避免紫色底漆或液状粘固剂流回到阀门内的隔膜或密封区域。

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If the engine backfires, the sudden pressure in the intake manifold forces the valve back.

如果发动机回火，进气歧管骤增的压力就迫使阀门向后移动。

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We've yet to hear back from Valve for clarification.

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Even if the Steambox initiative fizzles, there's always the massive ongoing success of Steam's digital storefront to fall back on. 2013 may be the year that Valve attacks, but it's not just the company's internal hardware projects that are up for the challenge.

ENGADGET: 2013: The year that Valve attacks HD

The goal is to tighten up or otherwise improve the faulty valve, called the esophageal sphincter, that lets acid reflux back into the esophagus.

FORBES: Health