Aimed at the fussy details of artificial design of engineering products

taking the fist-level gears transmission for example

using Visual Fortran to carry out the design calculation and the software interface design;adopting programs and database to store and retrieve design data;applying interface programs of Fortran-AutoCAD secondary development to realize the automatic drawing of engineering graphics;and finally could develop a practical CAD System.As a result

the system shows to be easy to learn and use

can greatly improve the design efficiency and quality and is valuable to use widely.