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<p>[QUOTE=&quot;moreotherstuff, post: 531465, member: 56&quot;]Back in the days when I worked repairing gas pumps, they had to be government inspected and certified accurate before they went back to the service station.&nbsp; The examination used something similar to that.&nbsp; It was a tin that held a fixed amount of gasoline (5 gal. as I recall).&nbsp; At the top of the tin was a graduated glass tube.&nbsp; You filled it with 5 gallons from the pump, so it read exactly 5 gallons on the pump.&nbsp; You checked that against the reading on that graduated tube, and it had to be within a cubic inch to pass inspection.[/QUOTE]</p><p><br /></p>

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