Grinding is the action of pulverizing various solids into finer materials. There are several tools that do this; the most basic are the grindstone, then the pulverizer, and finally the refinery (not to be confused with oil refinery).
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Grinding is the action of pulverizing various solids into finer materials. There are several tools that do this; the most basic are the grindstone, then the pulverizer, and finally the refinery (not to be confused with oil refinery).