The rotational energy is generated by an oscillating weight which is made to rotate by movement of the user' s arm.

转动能量是由使用者手臂上手表机心内的摆锤发出的。

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The rotational energy is generated by an oscillating weight which is made to rotate by movement of the user' s arm.

转动能量是由使用者手臂上手表机心内的摆锤发出的。

youdao