In 1919 the M A Hanna Co purchased two electric full revolving shovels one Marion 300 ton and one Bucyrus 225 B each equipped with 150 foot boom and complete dragline equipment They used 8 cubic yard buckets for stripping and 6 cubic yard buckets for ore when equipped as shovels
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Get PriceMay 20 2022The process of mining dates back to prehistoric times Prehistoric people first mined flint which was ideal for tools and weapons since it breaks into shards with sharp edges The mining of gold and copper also dates back to prehistoric times These profitable substances that are mined from the earth are called minerals
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