... ,B,C,E 4. Heating type: oil, electricity HRB-280 single facer corrugated machine Purpose and Characteristics: 1 Design Speed: 80m ... width: 1400mm-2200mm3 Corrugated roller:φ280mm4 Fingerless vacuum suction type single facer, the upper and lower corrugated roller made of 48 ... gap between glue roller and doctor roller by electric or manual are optional, Digital read out for the gap between glue ...