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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 4728.2-2018 |
Graphical symbols for electrical diagrams—Part 2：Symbol elements,Qualifying symbols and other symbols having general application 电气简图用图形符号 第2部分: 符号要素、限定符号和其他常用符号 |
China National Standards Qualifying |
 English PDF |
| GB/T 4728.2-2005 |
Graphical symbols for diagrams Part 2 Symbol elements,Qualifying symbols and other symbols having general application 电气简图用图形符号 第2部分:符号要素、限定符号和其他常用符号 |
China National Standards Qualifying |
English PDF |
| GB/T 17484-1998 |
Hydraulic fluid power--Fluid sample containers--Qualifying and controlling cleaning methods 液压油液取样容器 净化方法的鉴定和控制 |
China National Standards Qualifying |
English PDF |
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