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| 拱顶; 拱形炉顶 | |||
| 拱形屋顶 | |||
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arch roof : 29 phrases in 6 subjects |
| Architecture | 2 |
| Engineering geology | 1 |
| General | 1 |
| Metallurgy | 11 |
| Oil / petroleum | 2 |
| Technology | 12 |
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