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| 蜂窝夹层结构; 多孔层结构 | |||
| 多孔夹层结构; 蜂窝结构 | |||
| 多段结构蜂窝结构 | |||
| сотовая конструкция: 16 phrases in 3 subjects |
| General | 1 |
| Nautical | 1 |
| Technology | 14 |
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