Adagio and Rondo for glass harmonica, flute, oboe, viola, and cello.
为玻璃乐器，长笛，双簧管，中提琴，与大提琴的慢版与轮旋曲。
He also made the first pair of bifocal glasses and invented a musician instrument called the glass harmonica and a stepladder chair.
他还制造了世界上第一副双光眼镜，发明了一种叫玻璃琴的乐器和活动梯子。
He also made the first pair of bifocal glasses and invented a musician instrument called the glass harmonica and a stepladder chair.
他还制造了世界上第一副双光眼镜，发明了一种叫玻璃琴的乐器和活动梯子。
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