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Made In Rocks Crushers

Rock crusher history 911 metallurgist,apr 16, 2015 rock crusher history. history tells us, it was in 1830, the first US patent was issued on a rock crushing machine. It covered a device which, in a crude way, incorporated the drop hammer principle later used in the famous stamp mill, whose history is so intimately linked with that of the golden age of mining. In 1840, another patent was issued

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why-choose 40 years of history