... corrugated roll is made of 52CrMo precision forging alloy steel, with the treatment of hardening and tempering, grinding, laser-quenching, ... spraying tungsten carbide, make the hardness up to HVC1200.Equipped with spay wetness adjusting deivce to avoid paper cracking and keep ... , and connected by flexible metal hose.The machine is equipped with converter motor and Taiwan made PLC, as well as a safe ...