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Lens grinding machine - Free Patents Online - online lens grinding, Jul 15, 1975·,32;A machine for selectively grinding the peripheral edges of both glass lens materials and plastic lens materials to a predetermined size ,John M Pierce''s HobbyGraph Articles - AstronomyFig 1 shows a lens grinder, suitable for the amateur for making lenses up to 1" diameter It is also useful to those interested in grinding and polishing minerals and stones into cabochon gems ..



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