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Yamaha雅马哈电子琴SX600功能教学操作视频20：重置_OTS单触设定
京东：雅马哈（YAMAHA）天歌专卖店、金麦克乐器
Yamaha雅马哈电子琴PSR-SX600全套功能操作教学视频【49集】17/49
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