NA 027
DIN Standards Committee Optics and Precision Mechanics
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DIN ISO 9211-4
DIN ISO 9211-4
Optics and optical instruments - Optical coatings - Part 4: Specific test methods (ISO 9211-4:2006)
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Optik und optische Instrumente - Optische Schichten - Teil 4: Spezifische Prüfmethoden (ISO 9211-4:2006)