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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a joint with a mechanical connection in machines and structures; it ensures a constant relative position of parts during operation. Fixed joints facilitate the manufacture, repair, and shipment of parts; they may be demountable or nondemountable.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
In a structural framework, a joint that restrains a member from turning.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.