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| structural carbon steel medium | |||
| structural carbon steel, medium | |||
| semi-hard steel (0.3 〜0.4C, 0.15 〜0.25Si, 0.4 ~ 0.6Mn, <0.05S, <0.05P); semihard steel | |||
| half hard steel | |||
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中碳 结 构钢 : 3 phrases in 2 subjects |
| Construction | 1 |
| Technology | 2 |
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