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| 拱梁; 拱形梁 | |||
| 拱形梁 | |||
| 拱主梁; 拱副梁; 筒形梁 | |||
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| 拱形梁; 拱形辕杆 | |||
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arched beam : 3 phrases in 2 subjects |
| Agriculture | 1 |
| Technology | 2 |
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