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| 人防工程 | |||
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| 防空掩蔽所 | |||
| 防空洞; 人防地下室; 防空掩体 | |||
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| 防空洞 | |||
| 防空壕 | |||
| air raid shelters: 10 phrases in 4 subjects |
| Architecture | 1 |
| Engineering geology | 2 |
| General | 1 |
| Technology | 6 |
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