... steam pervasion are all lower than those of other board heat preservasion materials and they have the characteristics of ... 58 68 78 100 Driving motor power kw 75 9090 110 110132 Thickness of board mm 20,25,30, ... 100 40,50,60,75,100,120 Width of board mm 600,900 600,900,1200 600,900, ... colored ripple title; For making up the heat insulation board in the refrige ration storehouse for cold preservation and ...