
or VACUUM cleaner salesman,
or bootblack.
The Big Bang Theory Season 5, Episode 6

He's working on a paper
about nano VACUUM tubes,
The Big Bang Theory Season 7, Episode 7

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

This nano VACUUM tube idea of
yours is really interesting.
The Big Bang Theory Season 7, Episode 7

Dave, I found six VACUUM cleaner
repair shops in your area.
The Big Bang Theory Season 5, Episode 14