That is known to us all, in the modern mechanical manufacturing, CAPP system (Computer Aided Process Planning) is of great important theoretic significance and is required pressingly and extensively.

• 众所周知，在现代机械制造业中，CAPP系统(Computer Aided Process Planning，计算机辅助工艺规划)具有重要的理论意义和广泛、迫切的实际需求。