【摘要】 叙述了抛体运动轨迹投影演示器的设计思想、制作方法、应用范围及其特点等内容 ,为中学教师提供一种别开生面的演示教具更多还原

【Abstract】 The article states the design idea,the making method,the range of applying and the characteristic of projector scope of projectile motion locus,and provide an entirely new sort of projector instrument for the middle school teachers.更多还原