In order to understand the helical face and conjugate limits directly ,the paper deals with the method of drawing shining chart by shining curved surface to plane surface and puts forword the method of choosing the device datas directly and accuratly for devising knife blade in engineering.

Concerning the assembly and adjust parameter s influences on armature breaking velocity as the decision criterion,the major assembly and adjust parameters of aerospace electromagnetic relay were simulated and analyzed by using virtual prototype technology and the crucial parameters which influence armature breaking velocity were found.

A calculating method of bookbinding parameters of the liquid propellant utilizing system is designed, and the integrating method is studied of the distributed computation based on CORBA.