Commonly used electrician and a collection of selected specimens of electronics legend symbol

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One, graphic symbol basis international GB4728 " " electric graph uses graphic symbol " , consult international Electrotechnical Committee (IEC) regulation, 3, electric technology assists literal symbol basis GB GB7158-87 " the literal symbol in electric technology makes general rule " mix international Electrotechnical Committee (IEC) the article of serial number of auxiliary character symbol that international standard photograph of the regulation agrees CNC Milling