| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 21421.1-2008 | English | 754 |
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Days<=3
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Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V -- Part 1: Standard strength classes and end fittings
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GB/T 21421.1-2008
| Obsolete |
GB/T 21421.1-2008
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