... edges holdout, 3.stronger flexibility than WA, 1.vitrified grinding wheel cover various specifications of vitrified abrasives with the diameter ... harder than Boron carbide and Diamond, friable, its girt is sharp, and Thermal conductivity4 Suitable for grinding Hard alloy, Optical glass, ... as max speed, port, special bond and so on), when the function or grinding craft of product is required specially ...