... stand,single surface corrugating machine ,pre-heating cylinder,overhead bridge,multiple pre-heating cylinder,glue applying machine, ... the paper is sent to and pre-heated by the mult phase pre-heater.The glue putting machine ... a set of single facer, mill roll stand, pre heater and a bridge conveyor, it could produce ... two sets it could produce 7-layer, add three sets could produce 9-layer.The formed paper ...