色环电阻的识别与数值读取
色环电阻是在电阻封装上（即电阻表面）涂上一定颜色的色环，来代表这个电阻的阻值。色环实际上是早期为了帮助人们分辨不同阻值而设定的标准。色环电阻应用还是很广泛的，如家用电器、电子仪表、电子设备中常常可以见到。但由于色环电阻比较大，不适合现代高度集成的性能要求。
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