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| 伦琴射线; X射线 | |||
| X 射线 | |||
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| 伦琴X射线 | |||
| 伦琴射线; X光线 | |||
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| 伦琴射线 | |||
| roentgen ray: 7 phrases in 4 subjects |
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| Geophysics | 1 |
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| Technology | 2 |
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