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<p>[QUOTE=&quot;Bacchus, post: 42710, member: 759&quot;]Then an ounce (liquid) of water weighs the same as an ounce (avoirdupois) of water !&nbsp; I guess that&#039;s where one of the two was defined with respect with the other.</p><p><br /></p><p>In the metric world, (MKS and CGS), many (if not all) of the units are linked together like that; I&#039;m not used to seeing it with English units.[/QUOTE]</p><p><br /></p>

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