barrel organ

barrel-organ的词性：
n.Music （名词）【音乐】

1. A mechanical instrument on which a tune is played by the action of a revolving cylinder fitted with pegs or pins that open pipe valves supplied by a bellows.
手摇风琴：一种内部装有一个带弦纽或钉子的旋转圆筒的机械制动乐器。有风箱使风进入空心琴管内而产生音调