GB 50243-2016 第6.2.5条
| **** | Silencers and acoustic elbows shall be fabricated and installed with smooth, undamaged surfaces; the infill material shall be non-combustible, moisture-proof and odour-free, and shall not sag or deform. |
| **** | Silencers and acoustic elbows shall be fabricated and installed with smooth, undamaged surfaces; the infill material shall be non-combustible, moisture-proof and odour-free, and shall not sag or deform. |
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