Purging of the gas systems with a dry, inert gas such as nitrogen or argon, is recommended prior to breaking any connection of the gas system.

在断开系统的任何连接之前，推荐用干燥惰性气体，如氮或氩来净化气体系统。

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The properties of APV spray exhaust gas, and the problems that exist in past exhaust gas systems were introduced. The measures, its principle, process and effect is explained in revamping project.

介绍了APV喷雾干燥尾气的性质，原尾气系统存在的问题，改造中采取的措施、原理、流程和取得的效果。

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Siduria recently implemented a program to convert heating systems from oil to natural gas.

Siduria 最近实施了一项计划：将供暖来源从石油改为天然气。

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For example,animal waste and cattle digestive systems release methane gas.

VOA: special.2010.01.05

The number of moles stays the same a closed systems, gas doesn't come out.

摩尔数保持不变,因为是闭系，气体不会跑出去。

麻省理工公开课 - 热力学与动力学课程节选

Acquisitions include French media conglomerate Vivendi Universal, which GE folded into its NBC Universal unit, along with diagnostic imaging company Amersham and natural gas systems supplier Vector Gray.

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But greater Dhaka has become one of the world's most populous and fastest-growing megacities, driving up the price of land and straining the country's electrical, power and gas systems.

WSJ: Before Bangladesh Collapse, Some Clothing Retailers Fled Risk

The company also owns and operates gas gathering systems in its U.S. core producing areas.

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