如图所示是一火警报警器的一部分电路示意图其中r2为用半导体热敏材料其阻值随温度的升高而迅速减小制成的传感器电流表a为值班室的显示器 Template




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tomski如图所示是一火警报警器的一部分电路示意图其中r2为用半导体热敏材料其阻值随温度的升高而迅速减小制成的传感器电流表a为值班室的显示器 coloring