Gravity instruments are designed to measure variation in the force of gravity from one place to another rather than the absolute force itself . 重力仪的设计是为了测量一处到另一处的重力变化，而不是绝对重力值本身。
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Absolute gravity measurement 绝对重力测量
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Absolute gravity survey 绝对重力测量
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The relative gravimetries in the western area of yunnan province had been performed 28 times and absolute gravimetries many times till 1996 在滇西地区已用高精度拉柯斯特重力仪进行了28期相对重力测量和多次绝对重力测量。
