印字款圆面积圆周率计算公式推导演示器圆周演示器大演示教具 圆面积圆周率（无磁印字款）
$2.64
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印字款圆面积圆周率计算公式推导演示器圆周演示器大演示教具 圆面积圆周率（无磁印字款）
| 尺寸(Size) | 48x25cm |
| 材质(Material) | PP |
| 颜色(Color) | As shown |
| 主题(Theme) | Circumference Ratio Calculation |
| 型号(Model) | Formula Derivation Demo Model |
| 制造国家/地区(Country/Region of Manufacture) | China |