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随着长壁工作面产量的增加和设备的逐步完善,工作面的设备发展得更大、更重。经井下设备的模拟试验表明,许多设备都处
With the increase of the production of longwall face and the gradual improvement of the equipment, the equipment of the working face has developed more and more. After the underground equipment simulation tests show that many of the equipment at