A slab made by interlacing the glued veneer in the direction of the wood grain and pressing it under heating or non heating conditions. The number of layers is generally odd, and a few may have even numbers. The differences in physical and mechanical properties in the vertical and horizontal directions are relatively small. Commonly used are plywood, plywood, etc. Plywood can improve wood utilization and is a major way to save wood. It can also be used as wooden board for aircraft, ships, trains, automobiles, home decoration, buildings, and containers.