GB 50222-2017 第3.0.4条
| | Paper-faced gypsum board and mineral wool acoustic board installed on steel studs may be used as Grade A decoration materials (applicable to hotel ceilings, walls and similar areas). |
| | Paper-faced gypsum board and mineral wool acoustic board installed on steel studs may be used as Grade A decoration materials (applicable to hotel ceilings, walls and similar areas). |
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