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| fencing and supervision | |||
| protection works | |||
| prevention engineering | |||
| flood protection works | |||
| 防护工程: 29 phrases in 11 subjects |
| Agriculture | 1 |
| Bridge construction | 4 |
| Desert science | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Economy | 1 |
| Engineering geology | 2 |
| Hydroelectric power stations | 5 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 11 |
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