magnetic equator
plural of Mormon tea
plural of villagemate
By means of etiopathology.
(military) A line drawn on a map or chart connecting all points at which the magnetic inclination (dip) is zero for a specified epoch.
調査中、工兵隊はその時点の磁気傾斜がゼロとなる地点を結ぶ線、すなわち磁気赤道を図上に引いて方位磁石の補正値を決定した。
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