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| 曲线〔弯道〕加宽 | |||
| 曲线加宽 | |||
| 平曲线加宽; 弯段加宽弯道加宽 | |||
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curve widening : 15 phrases in 3 subjects |
| Bridge construction | 7 |
| Construction | 1 |
| Technology | 7 |
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