n.八分圓；八分儀；離角45度的位置

Keywords octant;circle interpolation;deviation; 卦限;圓弧插補;偏差;

an instrument for measuring the angular distance between celestial objects; resembles an octant 測量兩個天體之間的角距離；類似于八分儀

an instrument for measuring the angular distance between celestial objects; resembles an octant. 測量兩個天體之間的角距離；類似于八分儀。

octant anechoic chamber 卦限消聲室