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| 等截面; 无变化的截面 | |||
| 常数区域 | |||
| constant section: 27 phrases in 8 subjects |
| Architecture | 2 |
| Aviation | 1 |
| Bridge construction | 4 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Technology | 15 |
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