Building coated plywood is the plywood covered with film. The coated board is mainly used for construction and cement pouring. That layer of membrane is not easy to bond with cement. The building formwork is used on the construction site, mainly for concrete cast-in-situ Formwork - divided into wood formwork, steel formwork, bamboo formwork, machine pressing plate, etc. Plywood is a three-layer or more thin plate made of logs, which are spun into veneers or planed into thin wood, and then glued with adhesive. It is usually made of odd layers of veneers, and the fiber directions of adjacent layers of veneers are arranged and glued perpendicular to each other. Therefore, there are three ply, five ply, seven ply and other odd ply plywood. The two things are completely different.