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| 电子对产生关于X射线诱变 | |||
| 粒子偶的产生 | |||
| 电子偶的产生; 对产生; 粒子〔电子-正电子〕偶生成; 对生成 | |||
| 电子偶:对产生核 | |||
| 电子对产生 | |||
| pair production: 6 phrases in 2 subjects |
| Electronics | 2 |
| Technology | 4 |
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