The hurdy-gurdy is the only musical instrument that uses a crank to turn a wheel to rub strings, like the bow of a violin, It has three different kinds of strings.
仅有绞弦琴这种乐器 使用一种曲柄来操控木轮摩擦 琴弦来演奏歌曲， 功用与小提琴琴弓一样。 绞弦琴有三种不同的琴弦。