Due to some reasons of the face arrangement, the gas-suction effect, and so on, the first choice is the method of gas-suction over mining.
由于采场接替、抽放效果等诸多原因，随采随抽瓦斯方法为首选。
Due to some reasons of the face arrangement, the gas-suction effect, and so on, the first choice is the method of gas-suction over mining.
由于采场接替、抽放效果等诸多原因，随采随抽瓦斯方法为首选。
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