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| 钢环; 钢圈 | |||
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steel ring : 21 phrases in 7 subjects |
| Angling hobby | 2 |
| Bridge construction | 1 |
| Electric machinery | 2 |
| Metallurgy | 2 |
| Rail transport | 1 |
| Reproductive biology | 1 |
| Technology | 12 |
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