| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 5135.21-2011 | English | 259 |
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Days<=3
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Automatic sprinkler system -- Part 21: Inspector＇s test connection
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GB 5135.21-2011
| Valid |
GB 5135.21-2011
|