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释义
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Encyclopedia
工学
大地测量仪器
释
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度盘
一种平面角度的角度测量标准器。
理学
圆
释
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圆
在平面上到一个定点的距离为常数的点的轨迹。定点称为圆心,常数称为圆的半径。有时又称轨迹所围的部分为圆,称轨迹为圆周。
Physics
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①圆 ②圈,环 ③度盘 ④循环 ⑤周期
Mathematics
>拓扑学与几何学>初等几何学>释义
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圆
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圆
†
,圆周
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