To ensure safe production, the first mining face is tracking observed.
为保证安全生产，对首采面进行了跟踪观测。
Face to the mixture situation of people and god, the first task of Sima Qian's book historical Records is to identify opponents of materials, from mining historical data, looking for historical clues.
面对人神杂糅的情况，司马迁著作《史记》首要的任务就是要对手中的材料进行鉴别，从中挖掘史料，寻找历史线索。
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。
In the layout of the coal mining face, it would be first to mine the coal mining face near the syncline, then steadily to the anticline direction.
工作面布置上，应先开采位于向斜附近的工作面，然后往背斜方向逐渐展开。
In the layout of the coal mining face, it would be first to mine the coal mining face near the syncline, then steadily to the anticline direction.
工作面布置上，应先开采位于向斜附近的工作面，然后往背斜方向逐渐展开。
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