Measurements of electrical properties of electronic tubes ; methods of measurement of emission current from hot cathodes for high - vacuum electronic tubes and valves 电子管电气性能测试.第14部分:高真空电子管加热阴极
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Measurements of the electrical properties of electronic tubes . part 13 : methods of measurement of emission current from hot cathodes for high - vacuum electronic tubes and valves 电子管电性能的测量.第13部分:高真空电子管热阴极发射电流的测量方法