城市煤气 meaning in Chinese

city gas
town gas

Determination of hydrogen sulfide of gas in urban area
城市煤气中硫化氢含量测定
Determination of ammonia of gas in urban area
城市煤气中氨含量测定
Technical level standard for workers for urban gas and heating
城市煤气热力工人技术等级标准
Determination of prices of city piping gas
管道城市煤气价格的确定
Determination of naphthalene of gas in urban area - gas chromatographic method
城市煤气中萘含量测定气相色谱法

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