Precision Metal Stamping Aa Battery Contact Springs

Precision Metal Stamping Aa Battery Contact Springs

A spring is placed between the frame of the locomotive and the wheel, and the elasticity of the spring is used to slow down the bump of the vehicle. 6. Vibration sound function When the air flows from the harmonica in the harmonica in the accordion, the spring is struck and the reed vibrates to...

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A spring is placed between the frame of the locomotive and the wheel, and the elasticity of the spring is used to slow down the bump of the vehicle.
6. Vibration sound function
When the air flows from the harmonica in the harmonica in the accordion, the spring is struck and the reed vibrates to make a sound.

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