On 02/27/2016 1:24 PM, OFWW wrote:
....

... Or maybe I am just used to say 0" as meaning no
vacuum in my old trade.

Yes, apparently you are. That, as noted above, would be a shorthand
within that context that would be understood but is incomplete and
potentially misunderstood if translated to another context wherein the
missing reference units would not be automagically inferred.

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