The specification between aluminium and the material of duralumin board

 1.The material of board 1.1 lamella thickness> the material of board of a ～ 4.0 mms calls the lamella.   Width:A ～ a length:A ～ a the material of board for 1.2 slab thicknesses>4.0 mms calls the slab.  The material of board of the thickness a ～ 7.0 mms calls the slab of inside.   Width:A ～ a length:A ～ 10000 mms 1.3 colors draw the lamination material thickness:A ～ a width:A ～ a length:A ～ 4000 mms 1.4 prepare to pull to stretch the material of board