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AENOR Norma
UNE 20004-4:1972

UNE 20004-4:1972

SIMBOLOS (LITERALES Y GRAFICOS) Y ESQUEMAS EN ELECTROTECNIA. CONTACTOS, APARAMENTA, MANDOS MECANICOS, ARRANCANDORES Y RELES ELECTROMECANICOS

RECOMMENDED GRAPHICAL AND LITERAL SYMBOLS. CONTACTS, SWITCHGEAR, MECHANICAL CONTROLS, AND ELECTROMECHANICAL STARTERS AND RELAYS.

58
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