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| 槽钢截面 | |||
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| 槽钢 〔形〕截面 | |||
| 河槽横断面; 航道横断面; 槽钢截面 | |||
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channel cross section : 4 phrases in 3 subjects |
| Desert science | 1 |
| Hydroelectric power stations | 1 |
| Technology | 2 |
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