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Old 2009-02-28, 8:38pm
Moth Moth is offline
Mary Lockwood
 
Join Date: Jun 21, 2005
Location: Boonies
Posts: 5,831
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Does this link help?

http://mulliken.chem.hope.edu/~polik...echniques1.htm

If you scroll halfway down the page you get this text:
Rotary oil pump must be on to reduce the pressure to <10-2 Torr (otherwise, hot oil could combust in presence of oxygen)
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