| 摘要 |
A toy ball which emits sounds as it is rolled, comprising: a ball body; and a plurality of mechanically-operated sound tubes carried within the ball body, each sound tube including a sliding whistle which moves along the tube by the force of gravity, and each sound tube lying along a longitudinal axis, in which the axes are transverse to one another, so that the sound tubes emit sound when the ball is moved along various axes.
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