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| 多重弧; 多弧 | |||
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| 多弧 | |||
| multiple -arc: 21 phrases in 7 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 12 |
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