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In the area of "Impossible", I was recently asked to spec a vacuum pump that was "better" than the infinite(?) vacuum of space.
No this wasn't some exotic UltraHyperSuperStupendousHighVacuum stuff for an exotic instrument. We were just trying to empty a bottle from 1 bar to about 0.01 bar as quickly as possible.
When the requester is 2nd from the top at a national lab, it was hard to keep my reaction discreet enough to keep my job.
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'78SC, lots of other boring cars...
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