heavy-duty

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heavy-duty

subject to high import or export taxes
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

heavy-duty

[¦hev·ē ¦düd·ē]
(engineering)
Designed to withstand excessive strain.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.