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Nov 28, 2018018332The panel being worked on may be up to 800 feet in width and 7,000 feet in length. Mined coal is deposited onto a conveyor that moves the coal to a collection area. Hydraulically powered shields over the machine provide ceiling support. Longwall mining is more efficient than room and pillar mining, but the equipment is more expensive..
Our products sell well all over the world, and have advanced technology in the field of crushing sand grinding powder.