In 2006, Company of Exploration and Production in CNPC organized some relevant laboratories to do the composition analysis and comparison of natural gas samples in pipelines.

2006年中国石油股份公司勘探与生产分公司组织相关实验室对管输天然气样品进行了组成分析比对工作。

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The variations of lower heating value, theoretical air fuel ratio and combustion potential of natural gas fuel were investigated according to the variation of natural gas composition in China.

根据中国天然气组分变化的情况，研究了天然气组分变化时，燃料的低热值、理论空燃比和燃烧势等燃烧参数的变化；

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Aim Detecting and analysing the composition of the reactor where natural gas is converted to hydrocarbons.

目的检测和分析了天然气转化为碳二烃的反应器内的成分。

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Those carbon dioxide levels, in fact, have been dropping in the United States because of evolutions in the composition of electric generation from coal to natural gas, predicated on price structure and federal regulations.

FORBES: Lobbyists Try to Halt State Green Energy Standards