This nano vacuum TUBE idea of
yours is really interesting.
The Big Bang Theory Season 7, Episode 7
Vacuum TUBE amp,
which is, by far, the best,
anti-distortion-wise.
Breaking Bad Season 4, Episode 2
is to advance
along this TUBE in the subsoil
Money Heist Season 1, Episode 5
♪ A cathode ray TUBE
without an electron gun ♪
The Big Bang Theory Season 7, Episode 6
Tube!
Money Heist Season 3, Episode 3