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copper mining equipment used in the 20tph century

copper mining equipment used in the 20tph century

find cornish mining ancestors who do you think you are by the middle of the 19th century copper mining had become at least as important as tin mining and there were boom years in the 1850s and 1860s then disaster struck huge copper deposits were found by lake superior in america the vast copper mines of rio tinto were opened up in spain and the world price of copper slumped

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