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| 弹头钢心; 弹头钢心 | |||
| 钢芯; 钢心 | |||
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steel core : 19 phrases in 5 subjects |
| Agriculture | 1 |
| Electric machinery | 1 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Technology | 15 |
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