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