annular
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annular
[′an·yə·lər] (mining engineering)
The space between the casing and wall of a hole or between a drill pipe and casing.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
annular
Said of a ring-shaped structure or object.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.