This standard stipulates the following contents: ——Marking; ——Main shape and name of bonded abrasives; ——Standard circumferential profile of flat grinding wheel; ——External diameter range; ——Thickness range; ——Aperture range; — — characteristics; — flags. This standard applies to ordinary bonded abrasives (grinding wheels, grinding heads, sand tiles, grinding stones), not to diamond or cubic boron nitride abrasive products.