• The method can solve the technical problem of pre-extracting the coal bed gas of a coal bed, in particular for a low-permeability coal bed.

    发明可以解决煤层特别是渗透煤层煤层气抽采技术难题

    youdao

  • The method can solve the technical problem of pre-extracting the coal bed gas of a coal bed, in particular for a low-permeability coal bed.

    发明可以解决煤层特别是渗透煤层煤层气抽采技术难题

    youdao

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