(1) Classified by purpose, it is divided into ordinary plywood and special plywood.
(2) Ordinary plywood is divided into Class I plywood, Class II plywood, and Class III plywood, which are weather resistant, water-resistant, and moisture resistant plywood, respectively.
(3) Ordinary plywood is divided into non sanded board and sanded board according to whether the surface is sanded or not.
(4) According to tree species, it is divided into coniferous wood plywood and oak wood plywood.
