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Coal mining technology in china sciencedirect,nov 01, 1986 part iv. coal-mining and preparation energy vol. 11, no. 1112, pp. 145, 1986 44286 $3.00 0.00 printed in great britain pergamon journals ltd coal-mining technology IN china shen shfflua technical development department, ministry of coal industry, beijing, china abstractlthough china is the second largest coal-producing country in the world, the

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