Preliminary Vacuum

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Preliminary Vacuum

 

(Russian forvakuum), the state of a gas at pressures from 1 to 10–3 mm Hg (102-10–1 newtons per m2), produced in a vacuum system by special pumps prior to the activation of high-vacuum pumps and maintained at the outlet of the latter (seeVACUUM TECHNOLOGY and VACUUM PUMP).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
Full browser ?