对金属氧化物变阻器的物理特性进行了分析，并完成了MOV元件的数学建模，将其等效为电感、电阻、二极管三部分。
This paper analyses the physical characteristic of MOV and gives out its mathematical model by making it equivalent to inductance, resistance and diode three parts.
在那个时候唯一可靠的真空管就是WesternElectric中继器三极管，而如果需要变阻器时，就用金属丝缠在木卷轴上自己做一个。
In those days the only reliable vacuum tube was the Western Electric repeater triode, and if one needed a variable resistance he wound a lot of wire on a wooden spool.
在那个时候唯一可靠的真空管就是WesternElectric中继器三极管，而如果需要变阻器时，就用金属丝缠在木卷轴上自己做一个。
In those days the only reliable vacuum tube was the Western Electric repeater triode, and if one needed a variable resistance he wound a lot of wire on a wooden spool.
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