Spectacle lenses-Specification for tolerances on optical properties of mounted spectacle lenses
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Specification for tolerances on optical properties of mounted spectacle lenses
Document status: Active
Spectacle lenses-Specification for tolerances on optical properties of uncut finished lenses
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Specification for thick PVC sheeting (calendered, flexible, unsupported)
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Notes on the use of the Ringelmann and miniature smoke charts
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