The drag-link conveyer, which is important equipment in the coal production, plays an important role for the safety of the whole mining face.
刮板输送机是煤矿生产的重要运输设备，对于整个工作面的安全起着至关重要的作用。
The drag-link conveyer, which is important equipment in the coal production, plays an important role for the safety of the whole mining face.
刮板输送机是煤矿生产的重要运输设备，对于整个工作面的安全起着至关重要的作用。
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