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| |||
| 当量截面 | |||
| 当量圆断面 | |||
| 等圆断面; 等效截面; 等效断面; 等代断面 | |||
| equivalent section: 19 phrases in 7 subjects |
| Bridge construction | 4 |
| Construction | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Space | 1 |
| Technology | 9 |
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