OPTICAL GLASSES (GLASS TECHNOLOGY)
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BTGLASS MATERIALS
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UDC666.22
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Descriptor GEROPTISCHE GLÄSER (GLASTECHNOLOGIE)
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Descriptor ENGOPTICAL GLASSES (GLASS TECHNOLOGY)
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Descriptor FREVERRES D'OPTIQUE (TECHNOLOGIE DU VERRE)
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Variant GERGLÄSER/OPTISCHE GLÄSER (GLASTECHNOLOGIE)
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Variant ENGGLASSES/OPTICAL GLASSES (GLASS TECHNOLOGY)
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Variant FREOPTIQUE/VERRES D'OPTIQUE (TECHNOLOGIE DU VERRE)
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RTOPTICAL GLASSES, GLASS FOR SPECTACLES, COLOURED GLASS, FILTER GLASS (OPTICAL INSTRUMENTS)