SIMBOLOS (LITERALES Y GRAFICOS) Y ESQUEMAS EN ELECTROTECNIA. SIMBOLOS FUNCIONALES PARA TRANSMISION Y APLICACIONES DIVERSAS
RECOMMENDED GRAPHICAL SYMBOLS. BLOCK SYMBOLS FOR TRANSMISSION AND MISCELLANEOUS APPLICATIONS
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01.080.30 / Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation
33.020 / Telecommunications in general
CTN 200 - Basic electrical standards
IEC 117-13A:1971 (Identical)
IEC 117-13B:1972 (Identical)
IEC 117-13:1969 (Identical)
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