... chromium, beat the following in the 0.02mm9)Traction Rollers:adopt Japanese production of small semi-enclosed bearing, static ... levels do cross-processing, hard oxidation treatment, resistance, beating a small10) Drying device: ventilation with heat blowing three devices, ... 75mm), longer bridges, thick base, making the machine more stable.12) the control system: machine adopts PLC device: (1) start, (2 ...