The best way to work with CDR graphics is to of course use the default software for this format - CorelDRAW graphics suite. Of course not everyone has access to the software and in this case must use some 3rd party editing conversion tools that can be used for the purposes of cdr to eps conversion.
Export to PostScript formats (for example .eps encapsulated files) is usually done for printing purposes. You can find 3rd party tools like Inkscape that allows export to PostScript, but as always, using the original software is your best shot because of the compatibility.Open CDR file Open EPS file
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