grinding wheel to form convex, especially applicable to manual grinding figures.

摘要

THE GRINDING WHEEL (1) comprises a concavity (8) IN THE BASIS OF WHICH HAS A metal ring (4), which is not abrasive, but hard enough to resist wear by rubbing against the material being polished . THE GRINDING WHEEL (1) ACCORDINGLY removes material only until the metal ring (4) MEETS THE TOP OF convexly OBTAINED. RING (4) OPERA THEREFORE AS A STAND stop automatically prevents removal MATERIAL superfluous.