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| 吸声隔声顶棚 | |||
| 吸音平顶; 吸音顶棚; 吸声平顶; 吸声吊顶 | |||
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| 吸声隔声顶棚 | |||
| 吸音平顶; 吸音顶棚; 吸声平顶; 吸声吊顶 | |||
| acoustical ceiling: 117 phrases in 3 subjects |
| Architecture | 8 |
| Technology | 108 |
| Wind Energy | 1 |
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