Plywood is commonly known as the splint, fine core board, is the first to use a man-made plank in decorating industry, plywood is used after the glue logs rotary cut veneer of slab in wood grain direction crisscross, under the condition of heating or heating perpendicular suppression and become, the classification is according to the thickness of the plywood on the basis of the size, generally can be divided into 3 mm, 5 mm plate, 9 mm, 12 mm plate, 18 mile 15 mm plate and plate the six kinds of specifications.