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| 多次展开指层析 | |||
| 多次展开法 | |||
| multiple development: 17 phrases in 7 subjects |
| Biotechnology | 2 |
| Chemistry | 1 |
| Desert science | 1 |
| Electronics | 3 |
| Hydroelectric power stations | 2 |
| Metallurgy | 2 |
| Technology | 6 |
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