Grind

Grind might mean:

• The grind of a blade is the cross-section of the blade
• To finely grate something, like coffee beans
• In skateboarding, a grind is a trick on a skateboard
• grinding your teeth together

Grind Media

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  A wetgrinder is a hand-operated grinding stone where the swarf is gathered below the stone in water

• 

  The Wetgrinder was invented by Jens-Martin Nielsen in 1980.