This paper describes the process of stucture design of composites high-pressure nitrogen gas bottele.

本文阐述了复合材料高压氮气瓶的结构设计过程 ，并对试验结果进行了分析和讨论。

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A coiled tubing string is generally used to apply the treatment, which involves running to depth while pumping high-pressure nitrogen gas.

挠性管柱一般用来实施处理作业，它包括下至一定深度并泵入高压氮气。

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NOx is produced when the nitrogen from the air reacts with oxygen under high engine temperature and pressure conditions.

在高温高压下，空气与氧气反应，产生了氮氧化物。

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Then in the early 20th Century, German chemist Fritz Haber invented a high temperature-high pressure technique to convert atmospheric nitrogen into ammonia.

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