coated filament

• 敷料灯丝,直热式覆氧化物阴极

coated filament的用法和样例：

例句

1. The light of an electric lamp comes from an incandescent filament.
   电灯光亮来自白热的灯丝。
2. If the filament transformer has a center tap, don't use it.
   如果变压器灯丝绕组有抽头，请不要使用它。