| 摘要 |
<p>Normal grinding wheels which may be cylindrical, provided with a simple and double recess, in disk shape, in simple and double, cylindrical and conical cup shape, with a depressed center, annular, segmental, etc., have on their abrasive surface a plurality of projections and/or recesses of the rib and/or cavity type, of various shapes, distributed on said abrasive surfaces radially or at appropriaie angles according to the type of grinding wheel and the purpose thereof; said plurality of projections and/or recesses, ribs and/or cavities, as the case may be, constituting a "renewable toothing" over the entire length of the useful portion of the grinding wheel until it is worn out.</p> |
