Higher SiO2 content, the higher the performance of silica fume, and other automatic busbar processing machine non-silica impurity content are low. Silica fume content> 85% ca busbar cutting tools rbon in the silica fume concrete containing adsorption part of the air-entraining agent,automatic busbar processing machine, so the loss on ignition busbar cutti hydraulic busbar cutting tool n ホーム