The Chinese used a gravity meter to correct for local deviations in sea level.
中国人用重力仪来校正海平面的局部偏差。
Mono-pendulum experiment is used to measure local weight acceleration of gravity.
单摆实验是用来测量当地重力加速度的。
Mono-pendulum experiment is used to measure local weight acceleration of gravity.
单摆实验是用来测量当地重力加速度的。
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