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View of 25" x 212" Ruwolt designed primary cone (gyratory) crusher, March 1939. Photograph taken in Charles Ruwolt Fitting Shop showing one employee standing alongside the machine. It is believed that two of these Ruwolt designed crushers were built. The other built for Albion Quarries, N.S.W. Museum Ref. MM 012590. The crusher is capable of processing 300 tons per hour

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