... flutes needs different pairs of corrugating rollers to make.Flute Type: UV, flutes A,B, C ,BC,D,E , one of ... material 48CrMo alloy metal,heat treatment with high frequency,precise grinding, surface rigidity is over HRC55-60. High temperature grease for ... Silencer. Glue feeding device is driven back and down by cylinder (electro-motion). Glue trough might be made of stainless steel ...