A back grinding machine is required to grind the blank to 4.4mm thick (the flying knife cannot be ground to the surface of the product, and the surface of the flying knife is uneven and cannot pass the product appearance inspection.)
Back grinding machine is needed to grind the blank to 4.4mm thick (the surface of the product can not be ground by flying knife, and the surface ground by flying knife is uneven, which cannot pass the appearance inspection of the product. )