| 摘要 |
A wheel-driven percussion instrument includes a cam made on an inner side of one wheel of a baby car. A spring supported transmission rod in a casing at the bottom of the baby car reciprocates by action of the cam. Two metal plates bilaterally disposed inside the casing, and pendulum horizontally is disposed inside the casing. When the transmission rod reciprocates, the pendulum is moved to sound the metal plates alternatively.
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