GB 51251-2017 第9.4.3条
- **** | Air vents shall be made of non-combustible materials. In hotel buildings, all smoke control and exhaust air vents (e.g., aluminum alloy, stainless steel) must meet non-combustible requirements.
- **** | Air vents shall be made of non-combustible materials. In hotel buildings, all smoke control and exhaust air vents (e.g., aluminum alloy, stainless steel) must meet non-combustible requirements.
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