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Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Determination of nitrogen, oxygen and metallic and oxidic constituents. Original standard UNE-EN ISO 21068-3-2024 in PDF full version. Additional info + preview on request
Document status: Active
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon. XRD methods. Original standard UNE-EN ISO 21068-4-2024 in PDF full version. Additional info + preview on request
Document status: Active
Chemicals for the leather tanning industry. Determination of the total content of certain bisphenols. Original standard UNE-EN ISO 21135-2024 in PDF full version. Additional info + preview on request
Document status: Active
Intelligent transport systems. ITS station security services for secure session establishment and authentication between trusted devices. Original standard UNE-EN ISO 21177-2024 in PDF full version. Additional info + preview on request
Document status: Active
Acoustics. Hearing aid fitting management. Tele-services as part of hearing aid fitting management (tHAFM). Original standard UNE-EN ISO 21388-2-2024 in PDF full version. Additional info + preview on request
Document status: Active
Health informatics. Patient healthcard data - Medication data. Original standard UNE-EN ISO 21549-7-2024 in PDF full version. Additional info + preview on request
Document status: Withdrawn