| graphical-symbols.info | |
| 网站标题： | IEC/ISO Database on Graphical Symbols for Use on Equipment |
| 网站简介： | IEC/ISO Database on Graphical Symbols for Use on Equipment |
| 关键字： | graphical symbols equipment ISO IEC International Electrotechnical Commission International Organization for Standardization IEC 60417 ISO 7000 |
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