Anode of power supply for neutralization cathode filament is connected to ground, so that filament is at negative potential.
中和阴极灯丝电源的正极接地，使得整个中和阴极灯丝处于负电位；
Anode of power supply for neutralization cathode filament is connected to ground, so that filament is at negative potential.
中和阴极灯丝电源的正极接地，使得整个中和阴极灯丝处于负电位；
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