
through the cryocooler
or through the VACUUM filter.
The Big Bang Theory Season 10, Episode 20

Unlike objects falling in a VACUUM,
which...?
The Big Bang Theory Season 3, Episode 10

Vacuum tube amp,
which is, by far, the best,
anti-distortion-wise.
Breaking Bad Season 4, Episode 2

of virtual particles
in a VACUUM,
The Big Bang Theory Season 5, Episode 23

Oh, uh, we're making
nano VACUUM tubes.
The Big Bang Theory Season 7, Episode 7