What are the points of plywood?

(1) According to the use, 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 unsanded board and sanded board according to whether the surface is sanded or not.

(4) According to tree species, it is divided into conifer plywood and pavilion plywood