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Rational cutting height for large cutting height fully mechanized top-coal caving2020-06-12

Vertical transportation system of solid material for backfilling coal mining technology2020-06-12

Fracture mechanics model of fully mechanized top coal caving of shallow coal seams and its applicati2020-06-12

全贫液、半贫液低温甲醇洗工艺技术比较2020-06-12

全贫液、半贫液低温甲醇洗工艺技术比较2020-03-24