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| 有效〔作用〕质量 | |||
| 有效质量; 作用质量; 放射性材料 | |||
| 活性团 | |||
| active mass: 8 phrases in 6 subjects |
| Accumulators | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Space | 1 |
| Technology | 3 |
| Water resources | 1 |
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