气含量 meaning in Chinese

gas concentration

Method of determining coalbed methane content
煤层气含量测定方法
Analysis for influence factors of seam gas content in shaqu coalfield
沙曲井田煤层气含量影响因素分析
Method of test for air content of fresh concrete by volumetric method
容积法测量新浇混凝土中空气含量的试验方法
Analysis for influence factors of seam gas content of hanzhuang coalfield in yanquan mine area
阳泉矿区韩庄井田煤层气含量影响因素分析
Standard test method for air content of freshly mixed concrete by the pressure method
用压力法测定新搅拌混凝土中空气含量的标准试验方法

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