With the methods of documentation,observation and analysis,interview,the article makes a systematic all-round study on the tennis skill and tactics of backhand cuts,a summary analyses on the features and rules of skill and tactics of backhand cuts of the excellent players home and abroad,in order to provide a reference for a further promotion of our country tennis level.

Building up Cutting Technology Data Network,Developing National Cutting Technology;

To develop a new cutting technology and predict its future,the theory of inventive problems solving(TRIZ) technological evolution theory is used to study the fundamental branch specialized in forecasting technological system evolution.

This article,from several aspects like the cutting tool material,the coating technology,the innovation cutting tool structure,machining necessary technology,introduces the advanced cutting technology and the present situation of cutting tool development.