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    How to measure a PD on glasses

    0  Views: 423 Answers: 1 Posted: 12 years ago

    1 Answer

     


    See here>>http://www.stingyspecs.com.au/what-is-PD.html 


    >>>http://www.google.com/search?q=How+to+measure+a+PD+on+glasses&rlz=1C1LENN_enUS508US508&aq=f&oq=How+to+measure+a+PD+on+glasses&sugexp=chrome,mod=3&sourceid=chrome&ie=UTF-8



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