1.upper and lower corrugating rolls are makde of Ni-Cr-Mo alloy steel, with heated-treatment for hardness SHORE 700 or more and the surface is well treated by grind and plated-chrome 2.bearing for upper/lower corrugating roll, and pressure roll,uses high-temperature lubrication to keep running smoothly and durably. 3.Adjustment for upper corrugating roll, pressure roll and glue roll ,is controlled by pneumatic system. 4.This machine equips with pre-heater and pre-condition steam shower . 5.Clearance between lower corrugating roll and pressure roll, lower corrugating roll and glue roll ;glue roller and ductor roller is adjusted by electric micro-adjustment and digital indication 6.with motorized divising -glue device