reduction to the meridian
... reduction to sea level 海平面订正 reduction to the meridian 近中天高度订正 reduction type semiconductor 还原型半导体 ...
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reduction of the ex-meridian altitude
reduction of temperature to mean sea level 平均海平面温度订正 reduction of the ex-meridian altitude 近中天高度订正 reduction of tides 潮汐订正 ..
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