| 摘要 |
PURPOSE: A finishing board is provided to improve the durability of a background plate and to prevent the deformation of a background plate. CONSTITUTION: A finishing board comprises a natural rock surface plate, a reinforcement plate, and a background plate(100). The natural rock surface plate is formed into the constant size and thickness. The reinforcement plate is formed to be corresponded to the natural rock surface plate and is attached to the natural rock surface plate. The background plate is a lot formed than the natural rock surface plate and is attached to the reinforcement plate.
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