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展品内部有一个拉力传感器，当你用力握住把手后，该传感器受到握把上力的作用，产生了与力度大小相应的电信号，通过电路对其放大，再驱动指示灯，你的力度大小就显现出来了。用的力越大，亮的灯越多，反之就越小。
