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| 参变量 | |||
| 参变数 | |||
| cross variable: 32 phrases in 12 subjects |
| Architecture | 1 |
| Automobiles | 1 |
| Aviation | 2 |
| Bridge construction | 7 |
| Business | 1 |
| Earth sciences | 1 |
| Hydroelectric power stations | 4 |
| Nautical | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 11 |
| Wind Energy | 1 |
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