1.Drag onto the page to add a tube pentode with directly or indirectly heated cathode.
拖到绘图页后，可以添加具有直热式或旁热式阴极的电子管五极管。
2.Drag onto the page to add a tube pentode with directly or indirectly heated cathode.
3.Tube pentode with directly or indirectly heated cathode.
具有直接或间接加热的阴极的电子管五极管。