It's cut by puncher from reinforcing netlike fiberglass cloth for grinding wheel. The cloth was coated with phenolic resin and epoxy resin, and then was baked. Our products are devided into two big types. One type is nets coated with adhesive-bonded fabric and nets coated with black paper. The other type is pure net. Then netlike piece is widely used as the basal material of grinding wheel which adopts resin as adhesive agent. The grinding wheel which is made with this basal material has properties of excellent heat resistance, cutting at high speed and great structural strength.