FIABILIDAD DE EQUIPOS Y COMPONENTES ELECTRONICOS. EXPRESION MATEMATICA DE TERMINOS Y DEFINICIONES
MATHEMATICAL EXPRESSION TO THE TERMS AND DEFINITIONS FOR RELIABILITY. SYMBOLS
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21.020 / Characteristics and design of machines, apparatus, equipment
31.020 / Electronic components in general
CTN 200 - Basic electrical standards
IEC 271:1974 (Identical)
It is cancelled by: UNE 21302-191:1992
