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| 下封头 | |||
| 底封头【核】; 1另容器下封头 | |||
| 底封头; 底盘; 底盖 | |||
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bottom head : 12 phrases in 6 subjects |
| Compressors | 1 |
| Electronics | 4 |
| Finances | 1 |
| Metallurgy | 2 |
| Securities | 1 |
| Technology | 3 |
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