论文部分内容阅读
对ＧＢ４７２８的几点修改建议贺一平（浙江省交通学校）ＧＢ４７２８《电气图用图形符号》（以下简称“标准”）及国际电工委员会标准ＩＥＣ６１７《ＧｒａｐｈｉｃａｌＳｙｍｂｏｌｓｆｏｒＤｉａｇｒａｍｓ》对限定符号（ｑｕａｌｉｆｙｉｎｇｓｙｍｂｏｌｓ）中表示...
Several amendments proposed GB4728 HE Yi-ping (Zhejiang traffic school) GB4728 “Electrical diagrams with graphical symbols” (hereinafter referred to as “standard”) and the International Electrotechnical Commission standard IEC617 “GraphicalSymbolsfor Diagrams” Qualified symbols (qualifyingsym bols) said. ..