功率电子管 meaning in Chinese

power amplifier tube

Method of heater intermittent test of low - power electronic tubes
小功率电子管灯丝断续试验方法
Measurements of the electrical properties of low - power electronic tubes
小功率电子管电性能测试方法
Harmonized system of quality assessment for electronic components . blank detail specification . disk seal power tubes
电子元器件质量评估协调体系.空白详细规范.盘形密封功率电子管