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![YAMAHA PSR-31 [电子键盘型号与示范曲数据库]](https://lifesea.org/keyboard/_media/yamaha/psr/psr31.jpg "YAMAHA PSR-31 [电子键盘型号与示范曲数据库]")
YAMAHA PSR-31 [电子键盘型号与示范曲数据库]
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