Summarize the characteristics of roller-gear-cam and structure in ATC. Introduce the tool change process of automatic tool change, draw the motion circlegraph.
总结了滚子齿形凸轮的特点及其在自动换刀单元（ ATC）中滚子齿形凸轮的结构形式。
2
This is a perfect way for one to manage the friend circle and get rid of some of the noise in your social graph.
这是一个管理朋友圈并且剔除你社交图谱里一些“噪音”的好方法。
3
Circle matrix is the algebraic description of all the resource circles in a directed graph, and equivalence reciprocally to that one of complementary set and T-characteristic vector.