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Answer» What is Orifice mean? An orifice is any opening, mouth, hole or vent, as in a pipe, a plate, or a body Body orifice, any opening in the body of a human or animalOrifice plate, a restriction used to measure flow or to control pressure or flow, sometimes given specialised names:Calibrated orifice, used to control pressure or flowRestrictive flow orifice, used to control flowMiss Shilling's orifice, used to control flow in the engines of early Spitfire and Hurricane fighter aeroplanesBack Orifice, a controversial computer program designed for remote system administration reference
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