• Based on the productional practice, three ventilation means suitable for fully mechanized drives are put forward and some problems concerned in application process are given a necessary discussion.

    根据我国煤矿的生产实际提出了煤矿综巷道中适宜采用的三种通风方式其应用过程中的有关问题进行必要的探讨。

    youdao

  • Based on the productional practice, three ventilation means suitable for fully mechanized drives are put forward and some problems concerned in application process are given a necessary discussion.

    根据我国煤矿的生产实际提出了煤矿综巷道中适宜采用的三种通风方式其应用过程中的有关问题进行必要的探讨。

    youdao

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