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big machinery in coal mining

Nov 28 2018 · Longwall mining is more efficient than room and pillar mining but the equipment is more expensive Surface Mining For extracting coal which lies close the surface huge dragline shovel machines remove the topmost layers of soil and rock exposing the coal which is then removed by smaller machines...As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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