๐”– Bobbio Scriptorium
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Modern Pumps for High Vacua.

โœ Scribed by ANDRADE, E. N. DA C.

Book ID
109456946
Publisher
Nature Publishing Group
Year
1913
Tongue
English
Weight
278 KB
Volume
90
Category
Article
ISSN
0028-0836

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## During the several decades of ultra high vacuum history many changes have occurred both in technology and users' needs, and even the meaning of 'ultra high vacuum' has somehow evolved. The focus has moved from achieving the lowest pressure, when the only gas load is wall outgassing (static vacuum