| 摘要 |
An automatic player piano largely comprises mechanical components such as a keyboard, key action mechanisms, hammer mechanisms, damper mechanisms and pedal mechanisms and electrical components such as solenoid operated actuators associated with the keyboard and the pedal mechanism, a controller and sensors, and the pedal mechanism for a soft pedal is further associated with a mute lock mechanism so that the pedal mechanism can cause the hammers closer to the associated music wires for producing faint sounds.
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