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819. Vacuum pump having a radially segmented, annular anode: Gen electric co, US patent 3,368, 100, official gaz US patent office, 847 (1), 6th Feb 1968, 285.


Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
167 KB
Volume
18
Category
Article
ISSN
0042-207X

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