emery wheel

n.

金刚砂旋转磨石，砂轮；

Emery-wheel
Emery-wheel
Emery-wheel
Correspondence to Charles H. Morgan and the Morgan Construction Company
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Catalogue and price list of the Hart Emery Wheel Company, Hamilton, Canada manufactures of the celebrated Hart's patent solid emery ...
Gradient pump apparatus
The Wheel Turns.
THE TRI-FECTA OF HOW ALUMINUM WHEELS ARE MADE ALUMINUM WHEEL MANUFACTURING
The Wheel Turns | The BMJ
The Wheel Turns
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Motor skill learning requires active central myelination