... producing operate convenience;Corrugating roller adopt 48CrMo alloy steel,φ240-320mm,treated by imtermediate frequency quencher, ... charcoal treatment;45# steel lmtermediate frequency quencher,surface is plating hard ... 0kw,4.0kw,5.5kw,7.5kw,11kw Motor power5.5kw,7.5kw,11kwProducing speed40m/minEconomy ... ,C,B,E,F adsorption type single facer corrugated paperboard machine