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ＳｎＯ２气敏电阻在含ＣＯ空气中的振荡机理，给出了气敏电阻在含ＣＯ空气中的热学方程式，获得了振荡周期τ的近似表达式，气敏电阻起振的必要条件及振荡周期τ与ＣＯ气体浓度Ｎ、工作电压Ｖ的关系。
The oscillation mechanism of SnO2 varistor in air containing CO is given, and the thermal equation of the varistor in CO air is given. The approximate expression of the oscillation period τ is obtained. The necessary condition for the onset of oscillation of the varistor and the oscillation period τ And CO gas concentration N, the working voltage V relationship.