According to the characteristics of elliptical gears pitch curves and tooth distribution, the drawing software is used as an aided design tool, the 3D feature s creation process of elliptical gears is expounded in detail.

On the basis of the problem of drawing intersecting lines in engineering design with computer drawing software, this paper brings forward the use of the spline function and formula curve function by computer drawing software and the method of drawing intersecting lines.

The main work are data interface, drawing software, real time processing and operating system.

The secondary exploitation of specific AutoCAD software for landscape architecture design;

Using AutoCAD software to simulate the relative position change between balance beam and crane arm during hoisting course can offer accurate relative angles between the balance beam and the crane arm and provide in-site guidance to implement hoi.

With AutoCAD the shape of roll to be applied in strengthening round section is successfully designed.

Introduce application of AutoCAD to intensity determination,heat calculation and hydrodynamic calculation of boiler Supply skill in manual calculation of boiler Increase calculating speed and efficiency Improve the rationality and efficiency in boiler designin

AutoCAD, which is widely used in electric power engineering design, is short of the menus and tools to fulfill the customs and special demands of substation design.