pipe wrench

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pipe wrench

[′pīp ‚rench]
(design engineering)
A tool designed to grip and turn a pipe or rod about its axis in one direction only.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

pipe wrench

pipe wrench
A hand tool having one jaw movable and the other relatively fixed, the two being shaped so as to tighten when placed on a pipe and rotated in one direction.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.