GB 51251-2017 第5.2.3条
| **** | **Smoke exhaust outlet control**: The smoke exhaust outlet (or smoke exhaust valve) shall be capable of automatic opening via the fire linkage controller and shall be capable of manual opening on site. |
| **** | **Smoke exhaust outlet control**: The smoke exhaust outlet (or smoke exhaust valve) shall be capable of automatic opening via the fire linkage controller and shall be capable of manual opening on site. |
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