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the arastra rolling crusher

The Arastra Rolling Crusher

This article principally discusses the arastra the oldest rock crusher that had general use The arastra is the simplest instrument for grinding auriferous quartz It is a circular bed of stone from eight to twenty feet in diameter on which the quartz is ground by a large stone dragged round and round by horse or mulepower Handed down through the centuries the primitive arastra is still useful in certain

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