declination circle
... declination axis赤纬轴 declination circle赤纬盘 declinometer磁偏计 ...
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赤纬度盘 [天] circle of declination ; declination circle
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刻度盘的误差，是子午环固有的仪器误差之一，它直接影响了天体赤纬的测定精度。
The errors of the circle of a meridian circle will immediately affect the precision in determining celestial bodies' declinations.
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