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| 窄翼缘 (【技】根据 ISO6929： 1987,窄翼缘指的是 I 型钢的翼缘宽度不大于型钢公称高度的0.66 倍，且小于 300mm。) | |||
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narrow flange : 3 phrases in 3 subjects |
| Bridge construction | 1 |
| Compressors | 1 |
| Technology | 1 |
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