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Leaking of fluid between a cylinder and its piston during operation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The loss of pressure in the cylinder of a reciprocating engine resulting from the leakage of burned gases past the piston rings.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved