正在加载视频...
视频加载失败
Mathematics, Physics. "Dirac's Belt Trick is a clever way to remove two full twists in a ribbon by simply moving it around. This gives a way of connecting cables to a rotating object without them twisting or tangling." By Matt Henderson, Matt Henderson, used with permission.
0 条评论
暂无评论
原始帖子的评论将显示在这里

