By applying formal asymptotic analysis and Laplace transformation, we obtain two-dimensional model system of linearly viscoelastic "flexural" shell from three-dimensional equations.

Through AUTOCAD software s eplot function,you can transform all of the CAD s graph files into electronic graph files-DWF formation,and release them to the internet,so that the power plant s staff can use the superiority of their computers and network or internet timely and conveniently and speedily look up them.

As a solution,self-pringting AutoCAD graph file is put forward,and an effective printing method is introduced to solve the printing problems,and that the applicability of computerizing dynamic management and cyberizing applications of substation diagrms are improved,with certain economic value.