1. CORRUGATED BOARD PRODUCTION LINE 2.mill roll stand,preheater,single facer ,transport conveyer, gluing ... line is the professional equipment for making corrugated cardboard. Including mill roll stand,preheater,single facer ,transport conveyer, gluing machine ... the corrugated roller are middle frequency induction hardening. The top corrugated roller is drum type, with long service. automatic 5 layers ...