... 10mm or 20mm 2.Height of moulds 25mm 3.Paper shelf cylinder diameter 80mm leather punching machines(Leather Perforating ... loop movement, and punching the holes on leather, cloth, paper, foam, thin metal, PVC and other thin films.(samples following):Leather ... and software technology.a. Numerically controlled technology is the core of advanced manufacturing technology, and develops towards high-speed, ...