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| γ-射线探伤 | |||
| γ 射线照相术 | |||
| 伽马射线照相术 | |||
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| γ射线探伤; γ射线辐射照相术 | |||
| 伽马射线探伤 | |||
| gamma radiography: 1 phrase in 1 subject |
| Metallurgy | 1 |
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