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3相感應電動機旋轉磁場
Author:
歐鎮寬
GeoGebra
New Resources
錐體建築師
画直线等分三角形的面积
球体的体积推导（优化版）
兩位數加法
四邊形的特性
Discover Resources
三角函數
YH的GGB_BOOK
三角函數值 (特別角)
Multiplication of Directed Numbers
Copy of 二面角
Discover Topics
Statistical Characteristics
Step Functions
Expected Value
Polygons
Constructions