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| 普通碳素钢 | |||
| 普通钢; 碳素钢 | |||
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| 普通碳钢; 碳素钢 | |||
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| 普通钢 | |||
| plain steel: 32 phrases in 6 subjects |
| Bridge construction | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 9 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 18 |
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