英语词汇“piano roll”是什么意思，“piano roll”的读音、用法及例句翻译-乐坝网

词汇	piano roll
释义	piano rolln.（名词） A roll of paper containing perforations corresponding to the notes of a musical composition, used in operating a player piano.钢琴滚动条，钢琴纸卷：含有与乐曲音符相对应的孔洞的纸卷，用以操作自动钢琴
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