directly heated cathode

• 灯丝,直热式阴极

directly heated cathode的用法和样例：

例句

1. The source of electrons in an electron microscope is a heated filament.
   电子显微镜中的电子源，是一加热的灯丝。
2. The principles discussed in this report are applicable to all filamentary cathode structures.
   而本文所讨论的原理可以应用到各种类型的灯丝结构。