underground gas meaning in Chinese

地下煤气
地下气化的煤气

Construction scheme of dazhangtuo underground gas storage
大张坨地下储气库建设方案
A mechanical analysis on underground gas storage
地下储气库的力学分析
Condition and countermeasures on anticorrosion of underground gas pipeline
埋地燃气管道防腐现状与对策
Diffusion analysis of leaked gas during accident of underground gas pipeline
地下燃气管道事故泄漏扩散分析
Stability analysis of abandoned salt caverns used for underground gas storage
废弃盐穴地下储气库稳定性研究

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