EN 14012 [documento eletrónico] : Postal services - quality of service - complaints handling principles
EN 13850 [documento eletrónico] : postal services - quality of services - measurement of the transit time of end-to-end services for single piece priority mail and first class mail
EN 50065-1 [documento eletrónico] : signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz; : Part 1; : general requirements, frequency bands and electromagnetic disturbances / European Committee for Electrotechnical Standardization
EN 50470-3 [documento eletrónico] : electricity metering equipment (a.c.); : Part 3; : particular requirements - static meters for active energy (class indexes A, B and C) / European Committee for Electrotechnical Standardization
EN 50470-3/A1 [documento eletrónico] : electricity metering equipment (a.c.); : Part 3; : particular requirements - static meters for active energy (class indexes A, B and C) / European Committee for Electrotechnical Standardization