... pervasion are all lower than those of other board heat preservation materials and they have the characteristics ... ineensity,light material,airtight,anticorrosion,aging resistance,low cost,etc.It has been widely used in the ... ) 33 52Driving motor power(kw) 55 55Thickness of board (mm) 20,50,30,40,50,60,75, ... 100Width of board (mm) 600,900,1200Length of board (mm) 1200Production capacity (kg/h ...