• 2022-06-07
    According to the figure below, which of the following options does not match the serial number and name? ( )[img=583x316]1803a3a9559d2cf.png[/img]
    A: 1 - haulage roadway
    B: 2 - air inlet roadway
    C: 3 - belt conveyor
    D: 4 - switch, pump station and electrical equipment