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Dry sand production line with an output of 50 tons per hour

The rate of ore production expanded in the years between 1953 and 1973 rising to 274 million tonnes in 1960 365 million tonnes in the 196566 financial year and plateauing for a time at 72 million tons per year 26 million tons per year of leadzinc ore and 46 million tons per year of copper ore in 1973

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Kexue Revenue, High and New Technology Industrial Development Zone, Zhengzhou, China

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