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Software preparation:
1. Visio
2. PDF Creator (other PDF software will do)
3. Adobe.Acrobat.X.Pro
Links: https://pan.baidu.com/s/16jfn5ASzY2fqwIyj3B7FkQ
extraction code: yvdm
step:
1. Visio: File - Print - print settings in selected areas - Print (DPF obtained file);.
2. Adobe.Acrobat.X.Pro open a PDF file: File - Save As - more options - Embedded PostScript-- determined (Figure eps get no boundaries);
3. Double-click the step of generating the open eps FIG: file - PS to EPS (eps FIG finally obtained automatically boundaries).
PS: can GSview years, Options - Show Boundary Box showing the boundary of the image.