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| 特征 X- 射线 | |||
| 特征 X 射线; 标识 X 射线 | |||
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| 特性 X 射线 | |||
| 特征 X 射线; 标识伦琴射线 | |||
| 特征X射线 | |||
| 标识X辐射; 特性X-射线 | |||
| characteristic X-rays: 10 phrases in 2 subjects |
| Metallurgy | 3 |
| Technology | 7 |
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