您要查找的是不是：
- external common tangent circle 外公切圆
- Internal and External Common Tangent Circles of Three Circles Which Are Externally Tangent Each Other 三个两两相外切圆的内公切圆与外公切圆
- We put forward in this article the method of applying common tangent circle drawing to draw ellipses. 提出应用公切圆法画椭圆，可不必推平行线和多次加长圆规，只需用直线尺作图，且理论上误差为零。
- external common tangent plane 外公切面
- internal common tangent circle 内公切圆
- external common tangent 外公切线
- For ?0 we naturally get a circle; for ?0 we obtain two tangent circles. 对?0我们当然得到一个圆；对?0得到两个相切的圆。
- It indicates that reversed tangential air admission can reduce the diameter of actual tangent circle distinctly, and eliminate the redidual rotation obviously on the cold test. 通过实体锅炉冷态等温试验,表明上二次反切风能较明显地减小实际切圆直径,对消除炉膛出口残余旋转效果显著。
- Given the algorithm for solving common tangent ball mechanism and network search algorithms. 给出了求解公切线的算法和网络搜索球机制的算法。
- Server clusters support multiple connection media for the external common devices, which must be accessible by all servers in the cluster. 对于必须可以被群集中的所有服务器访问的外部公用设备,服务器群集支持这些设备使用多个连接媒体。
- Similar Point : Given two circles, construction their outer and inner tangent lines.Then the outer similar point P is the intersection of outer common tangents of two circles. 相似点：给定两圆，作两圆之外公切线及内公切线，则两外公切线的交点P为"外相似点"；
- Knowledge without common sense counts for little. 光有学问而无常识，则这种学问无甚价值。
- Monge Theorem : Given three circles, and construct common tangents of two circles mutually. Then three points lies in a straight line. 蒙日定理：给定三圆，则两两圆的外公切线交点在同一直线上(蒙日直线)。
- He is just listening in external of that room. 他正在那房间的外面留神听着。
- This news program only covers external events. 这一新闻节目只报道国外消息。
- Salt is a common food preservative. 盐是一种常用的食物防腐剂。
- She sets great store by external politeness. 她很注重表面的虚礼。
- There is still no cure for the common cold. 目前仍没有治愈感冒的良药。
- Huxley, I feel, has much in common with Wells. 我觉得赫胥黎和威尔士有很多共同之处。
- Rabbits and foxes are common in Britain. 兔子和狐狸在英国很常见。
