๐”– Bobbio Scriptorium
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Multiple roller bearing-shaft systems

โœ Scribed by G. Ioannou; A. Woowat; R. Gohar


Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
788 KB
Volume
81
Category
Article
ISSN
0043-1648

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Applicant: Mahle Metal Leve S/a, Brazil This patent describes a piston ring, particularly devised for use in internal combustion engines or compressors. It consists of a metallic base to which is applied -by physical vapour deposition -a coating of chromium nitride that has a periodicity (P), formed