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Feb 27 2016 Bord and Pillar method of mining is one of the oldest methods 3 INTRODUCTION In India about 98 of underground output of coal is obtained by Bord and Pillar method and barely about 2 by longwall methods The other countries where Bord and Pillar method predominates are Australia The USA and South Africa mining mill doe sale pakistan gezondmetgeld. mining mill doe sale pakistan


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