... filament cathode 直热式阴极 filament center tap 灯丝中点引线 filament characteristic 灯丝特性 ...
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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。
youdao
If the filament transformer has a center tap, don 't use it.
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