The article has introduced the gas geologic features in B4 Coal Seam in Fengcheng Colliery and analyzed the correlation factors of gas occurrence regularity.
本文简要叙述了丰城矿区B4煤层瓦斯地质特征，分析了瓦斯赋存规律相关因素。
At present many home laboratories use gas chromatography methods to measure co, this passage compared gas chromatography methods with gas filter correlation technique.
目前国内很多实验室采用气相色谱法对CO组分进行定值，本文就气相色谱法和气体滤光相关技术对CO的定值结果进行了比对。
This result is achieved by oil / oil or gas / gas correlation .
通过石油/石油或天然气/天然气的对比便可得到这个结果。
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