| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| HG/T 21520-2014 | English | 369 |
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Days<=3
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Slip on flange manholes with davit to vertical cover
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HG/T 21520-2014
| Valid |
HG/T 21520-2014
|