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| 空方阵 | |||
| 中空方形布局 | |||
| 消波混凝土块体 | |||
| 空心四方块体; 空心方块 (一种防波堤块体) | |||
| hollow square: 10 phrases in 4 subjects |
| Architecture | 1 |
| Bridge construction | 1 |
| Exhibitions | 2 |
| Technology | 6 |
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