Question: Low-pressure flow meter provers are tested with different sized orifices so that: A. a replacement orifice is handy if there is a problem with the
Low-pressure flow meter provers are tested with different sized orifices so that: A. a replacement orifice is handy if there is a problem with the others B. the meter can be checked at different rates C. the orifice can be thrown away after each test
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