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| 横截面面积 | |||
| 流道面积; 通道面积 | |||
| 流道断面; 交通面积; 通路面积 | |||
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passage area : 13 phrases in 8 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| China | 1 |
| Desert science | 2 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 4 |
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