COLLEGAMENTI ESTERNI
LETEC Technologie Büro, partner commerciale per la Zona 7 in Germania
UNI Ente Nazionale Italiano di Unificazione
CEN European Committee for Standardization
CENELEC European Committee for Electrotechnical Standardization
IEC International Electrotechnical Commission
ISO International Organization for Standardization
UL Underwriters Laboratories
CSA Canadian Standards Association
RALE Transformer Design Software
