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View of crusher head of the 25" X 212" primary cone (gyratory) crusher head showing lower head plate, March 1939. Photograph taken in Charles Ruwolt Fitting Shop showing one employee standing alongside the component. 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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