Graphical symbols for electrical diagrams—Part 1:General information
MOD IEC 60617 database
全国电气信息结构、文件编制和图形符号标准化技术委员会(SAC/TC 27)
GB/T 4728的本部分规定了电气简图用图形符号的一般说明。 本部分适用于电气简图用图形符号。
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