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碱 性土 : 33 phrases in 10 subjects |
| Agriculture | 3 |
| Bridge construction | 2 |
| Desert science | 3 |
| Electronics | 2 |
| Engineering geology | 2 |
| Environment | 2 |
| Hydroelectric power stations | 2 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Technology | 13 |
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