diy自制手摇发电机学生科学实验材料包儿童科普小制作小发明
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diy自制手摇发电机学生科学实验材料包儿童科普小制作小发明
| 颜色(Color) | Unpainted |
| 尺寸(Size) | 15cmx15cmx5cm |
| 材质(Material) | Wooden |
| 年龄层(Age Level) | 8-11 Years |