Convert to jpeg:

First create *.eps:
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ps2epsi r134a.ps r134a.epsi
mv r134a.epsi r134a.eps


Secondly create jpg (-ryyy sets the resolution)
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gs -sDEVICE=jpeg -dJPEGQ=100 -dNOPAUSE -dBATCH -dSAFER -r450 -sOutputFile=r134a.jpg r134a.epsi 