发明人:黄永宏荣获十年优秀成果发明展“金杯奖”功能如下:1.擦局部黑板;2.警示学生听讲;3.可将粉笔销尖;4.可看到背后的学生纪律;5.提醒学生看书写字的最佳保健距离;6.画椭圆;7.画垂线;8.显示时间;9.备有彩色粉笔;10.有扩大比例尺;11.作直尺;12.有缩小比例尺;13.可将挂图托挂在黑板上;14.可画坐标;15.可画角或量角度; Inventor: Huang Yonghong won ten years of outstanding achievements Invention exhibition “Golden Cup Award” features are as follows: 1. Wipe the local blackboard; 2. Alert students to listen to; 3. Can be chalk tip; 4. Can be seen behind the student discipline; Remind students to see the best health care distance for writing characters; 6. draw ellipses; 7. draw vertical lines; 8. display time; 9. prepare colored chalk; 10. enlarge scale; 11. make ruler; 12. reduce scale 13.13. The wall chart can be hung on the blackboard; 14. The coordinates can be drawn; 15. The angle can be painted or measured;