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The grave-force (Gf), is a gravitational metric unit of force. It is equal to the magnitude of the force exerted by one kilogram of mass in a 9.80665 m/s2 gravitational field (standard gravity, a conventional value approximating the average magnitude of gravity on Earth).
The ounce-force (symbol: ozf) is a unit of force used in some systems of measurement including English Engineering units and the British Gravitational System.