On my 12th birthday,
I really wanted a titanium CENTRIFUGE...
The Big Bang Theory Season 1, Episode 16
the whir of the CENTRIFUGE,
The Big Bang Theory Season 5, Episode 16
I got a look at the CENTRIFUGE
The Big Bang Theory Season 5, Episode 18
The rate of spinning
for the central axis CENTRIFUGE
The Big Bang Theory Season 10, Episode 20
Instead of a titanium CENTRIFUGE,
my parents bought me...
The Big Bang Theory Season 1, Episode 16