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what are the byproducts of copper through mining-mining equiments supplier

Feb 12, 2021 USGS said that global copper output declined slightly over previous year primarily due to COVID-19 lockdowns in April and May. These disruptions significantly affected output in Peru, the second-ranked mine producer of copper, where production through July 2020 fell by nearly 250,000 tonnes (23%) from that in the same period of 2019.