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| 桁架拱 | |||
| 空腹拱; 桁架式拱 | |||
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| 固肩拱 | |||
| 肩桁拱; 桁架式拱; 腹部支撑拱; 空腹拱 | |||
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spandrel braced arch : 4 phrases in 3 subjects |
| Bridge construction | 2 |
| Hydroelectric power stations | 1 |
| Technology | 1 |
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