| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| DL/T 1720-2017 | English | 229 |
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Days<=3
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Technical guide for helicopter live working on overheard transmission line
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DL/T 1720-2017
| Valid |
DL/T 1720-2017
|