如图所示为自制的握力计的原理示意图将�动变阻器r1的�属�片与三股弹簧相连弹簧的另一端通过保护电阻r2接在电源的负极.手握测力计当力在0 Template




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tomski如图所示为自制的握力计的原理示意图将�动变阻器r1的�属�片与三股弹簧相连弹簧的另一端通过保护电阻r2接在电源的负极.手握测力计当力在0 coloring