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| 三角形断面 | |||
| 三角型材; 三角断面; 三角型材 【钢】 | |||
| 三角形截面 | |||
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triangular section : 9 phrases in 3 subjects |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Technology | 6 |
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