GB 50311-2016 第6.0.10条
| | When cables penetrate floor slabs or firewalls, firestop materials shall be used to seal the openings, and the corresponding fire-resistance rating requirements shall be met. |
| | When cables penetrate floor slabs or firewalls, firestop materials shall be used to seal the openings, and the corresponding fire-resistance rating requirements shall be met. |
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