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| Author | Subject: uncut blanks |
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 godzilla
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uncut blanks
Apr 02, 2005 13:55:25 Can someone tell me what the segment drop is on an uncut bifocal and trifocal blank? These values are constant and are needed to work out blank size |
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godzilla
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RE: uncut blanks
Apr 07, 2005 20:53:55 anyone know how to calculate blank size for a bifocal and trifocal? Or more specifically, how to calculate vertical decentration required? |