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nd hand coal mining crushers

2NdHand Coal Mining Crushers. Secondhandjawcrushersportable in u s a a abutment incoal mining1 the weight of the rocks above a narrow roadway is transferred to the solidcoalalong the sides which act as abutments of the arch of strata spanning the roadway and 2 the weight of the rocks over a longwall face is transferred to the front abutment that is the solidcoalahead of …

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