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   VSI mill
   VSI mill (vertical shaft impactor mill) is the type of fine grinder which is used a free impact of material particles with a wear plate. Any hard or friable materials can be ground with low value of metal waste. This type of mill is combined with a classifier for fine tuning of a product size. ==Op...
   Found op http://en.wikipedia.org/wiki/VSI_mill
   
   

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