Carbon dioxide is a species of weak acidic gas, it is a erodent in oil and gas industries, its content in natural gas may vary from trace to more than 50%.

二氧化碳是一种弱酸性气体，它在石油及气体工业中是一种腐蚀剂，它在天然气中的含量少则痕迹，至50%以上。

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The naphthalene content of coke oven gas can be reduced effectively through several measures, including improving production technology and management in naphthalene washing with diesel oil.

在焦炉煤气柴油洗萘中，通过改进生产工艺、加强生产管理等措施，可以有效地降低城市煤气中的萘含量。

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The increase of oxygen content in gas can reduce the oxygen content in the oil.

气体中氧的增加可以使油中的氧含量降低。

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