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| 管涵; 圆管涵 | |||
| 管道涵洞 | |||
| 管涵洞 | |||
| 涵管; 管式涵洞 | |||
| 管道; 涵洞 | |||
| 管渠; 管道排水涵洞 | |||
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pipe culvert : 31 phrases in 5 subjects |
| Bridge construction | 7 |
| Hydraulics | 1 |
| Hydroelectric power stations | 3 |
| Oil / petroleum | 1 |
| Technology | 19 |
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