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swing joint[′swiŋ ‚jȯint]
A pipe joint in which the parts may be rotated relative to each other.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A type of joint used with threaded pipe which permits motion to occur when the pipes are heated or cooled, without bending of the pipes; esp. used in riser and radiator connections.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.