The drawing out of coal bed methane was began in 1958 for fail to safety in coal mine production.

基于矿井安全生产，从1958年开始抽放矿井瓦斯，抽放量不断提高，瓦斯利用规模迅速扩大。

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The drawing out of coal bed methane was began in 1958 for fail to safety in coal mine production.

基于矿井安全生产，从1958年开始抽放矿井瓦斯，抽放量不断提高，瓦斯利用规模迅速扩大。

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