ETSI:European Telecommunication Standards Institute
European installation bus
European standard allergen
European Telecommunication Standards Institute ETSI
European Telecommunication Standards Institute， ETSI
The European Telecommunication Institute
European Telecommunication Standards Institute
International Telecommunication Union-Telecommunication Standard Sector ITU-T
telecommunication standard
standard instruction set
standard standard of vo|
bridge installation instruction
filter installation instruction
installation instruction
Institution institution
European Union [EU] [developed from the European Community]