... end pre-bendingThe straightedge length can be set freely, the upper roller press to pre-bend.2.NC ccontrol, high productivityParameters ... , easy for operation, improve the productivity greatly.3.Good accuracyThe upper roller is like a drum, the lower rollers assorted with ... thick plates widely.4. SafetyThe lower rollers are fixed, the upper roller move vertically amd horizontally. The job does not move ...