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Iron Ore Crusher Accident
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Iron Ore Crusher Accident

Iron Ore Crusher Accident

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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