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| 主梁 | |||
| 原射线束 | |||
| 原始束流; 有用束流; 照明束; 初级射束 | |||
| English thesaurus | |||
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| PB | |||
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primary beam : 9 phrases in 6 subjects |
| Bridge construction | 1 |
| General | 1 |
| Metallurgy | 4 |
| Shipbuilding | 1 |
| Technology | 1 |
| Telecommunications | 1 |
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