| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| DL/T 557-2021 | English | 349 |
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Days<=3
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(Definition, test method and criterion of impact breakdown test in air for high voltage line insulators)
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DL/T 557-2021
| Valid |
DL/T 557-2021
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