NA 131
DIN Standards Committee Aerospace
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ISO 2064
ISO 2064
Metallic and other inorganic coatings - Definitions and conventions concerning the measurement of thickness
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Metallische und andere anorganische Schichten - Definitionen und Festlegungen, die die Messung der Schichtdicke betreffen (ISO 2064:1996)
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NA 062-01-61 AA - Measuring and test methods for coatings and coating systems