| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| SL 257-2017 | English | 1749 |
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Days<=9
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[SL/T 257-2017] (Waterway observation specification)
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SL 257-2017
| Valid |
SL 257-2017
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