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为什么钟表里的指针会移动

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为什么钟表里的指针会移动?

机械钟表里装着卷成一圈的弹簧,还有许多非常jing1细的小齿lun。卷jin的弹簧在松开时释放能量传送到小齿lun上,小齿lun在转动时就会带动指针一格一格地移动了。石英表则是依靠它里面的石英晶ti的震动来使指针移动的。

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