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Abstract In order to solve the problems of backward equipments low recovery security issues high mortality in the coal industry the technology of manless working face in mine which combined the traditional mining process with the automatic technology is proposed based on the scientized mining meanwhile the idea of exploiting the protective seam in the coal seam group of the coal and gasChat Online
Hammer mill Hammer crusher hammer mill Raymond mill Hammer Mill Finished size 0-22mm Capacity 3-45t/h Application widely used in metallurgy mining ch Địa chỉ của chúng tôi Đại lộ Khoa học Khu công nghệ cao Thành phố Trịnh Châu Tỉnh Hà NamChat Online