PREVIEW

... pressure gas discharge tube.

   This can be said to be an enlightenment device for human beings to really touch the microcosm. In addition, it has a more standardized name in concept.

That is.

  Low pressure gas electron tube.

Of course.

  The concept of the electron tube has not yet been born, and it will not appear until 1904.

  At that time, John Ambrose Fleming, a student of Wheat, made his debut and invented the famous electronic diode.

   ...

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