High Quality Content by WIKIPEDIA articles! Plywood is a type of manufactured wood made from thin sheets of wood. The layers are glued together so that adjacent plies have their wood grain at right angles to each other for greater strength. There are usually an odd number of plies, as the symmetry makes the board less prone to warping.A common reason for using plywood instead of plain wood is its resistance to cracking, shrinkage, twisting/warping, and its general high degree of strength.

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