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AENOR Norma
UNE 20004-7:1973

UNE 20004-7:1973

SIMBOLOS GRAFICOS Y ESQUEMAS EN ELECTROTECNIA. VARIABILIDADES, EJEMPLOS DE RESISTENCIAS, ELEMENTOS DE TUBOS ELECTRONICOS, VALVULAS Y RECTIFICADORES

RECOMMENDED GRAPHICAL AND LITERAL SYMBOLS. VARIABILITIES EXAMPLES OF RESISTANCES, ELEMENTS OF ELECTRONIC TUBES, VALUES AND RECTIFIERS.

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