Instead of a titanium CENTRIFUGE,
my parents bought me...
The Big Bang Theory Season 1, Episode 16
They're training dogs
to operate the CENTRIFUGE...
The Big Bang Theory Season 1, Episode 11
I got a look at the CENTRIFUGE
The Big Bang Theory Season 5, Episode 18
On my 12th birthday,
I really wanted a titanium CENTRIFUGE...
The Big Bang Theory Season 1, Episode 16
...for when they need dogs to operate
the CENTRIFUGE for blind scientists.
The Big Bang Theory Season 1, Episode 11