如图所示是一火警报警的一部分电路示意图.其中r2为用半导体材料制成的负温度系数热敏电阻传感器其电阻随温度的升高而减小.电流表为值班室的显示 Template




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tomski如图所示是一火警报警的一部分电路示意图.其中r2为用半导体材料制成的负温度系数热敏电阻传感器其电阻随温度的升高而减小.电流表为值班室的显示 coloring