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| 松散结构; 多孔结构 | |||
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loose structure : 11 phrases in 7 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Business | 1 |
| Economy | 1 |
| Hydroelectric power stations | 1 |
| Technology | 2 |
| Textile industry | 4 |
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