The gas pressure is a main factor of deciding gas content in coal seam. It is an important parameter of the dangerous prediction for coal and gas outburst too.
煤层瓦斯压力是决定煤层瓦斯含量的一个主要因素，也是煤与瓦斯突出危险性预测的一个重要参数。
Gas content varies directly with depth of burial and working thickness, depth of burial is the main factor which influence the gas emission of Qixing mine.
瓦斯含量与煤层埋深、煤厚呈正相关关系，煤层埋深是七星矿井瓦斯含量的主控因素。
Sampling pre-treatment system is an important factor in magneto-dynamic oxygen analyzer system for detecting the oxygen content in coke oven gas.
在监测焦炉煤气氧含量的磁力机械式氧分析仪系统中，采样预处理系统是一个重要环节。
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