The method in this paper is also adapted for other pressure valves.

本文的分析方法也适用于其它类型的压力阀。

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Several different types of valves are in use. Some are back pressure valves.

有几种不同的阀在使用中，有些是反向压力阀。

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The Factory covers an area of 8 mu. Its main products are series of hydraulic pressure valves, which has a very broad market.

工矿机电配件厂占地8亩，主要生产液压阀、磁性槽楔等，产品畅销。

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The oil pressure will force it up into the heart of the stack of valves.

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These valves use a screw type valve instead of a simple flap, and they have a pressure regulating mechanism that will vent water to the ground if the intake pressure exceeds a set level.

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We variously talked about fitting bicycle valves to the caps and pumping them up, building a hyperbaric chamber to fill the bottles under pressure and finally liquid nitrogen.

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