| 摘要 |
A piano (upright or horizontal) including a piano case having a case surface temporarily adhering markings. An upright piano including a piano case having a reversible display panel selectively positionable among a display position and a marking position. The panel has a decorative display side and a markable side, which temporarily adheres markings. The decorative display side faces outward while in the display position and the markable side faces outward while in the marking position.
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