SIMBOLOS (LITERALES Y GRAFICOS) Y ESQUEMAS EN ELECTROTECNIA. TELEFONIA, TELEGRAFIA Y TRANSDUCTORES
RECOMMENDED GRAPHICAL SIMBOLS. TELEPHONY, TELEGRAPHY AND TRANSDUCERS
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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
33.040.01 / Telecommunication systems in general
CTN 200 - Basic electrical standards
IEC 117-9 (Identical)
IEC 117-9A (Identical)
IEC 117-9B (Identical)
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