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| У銅线防护屏; У射线屏蔽体【核】 | |||
| γ射线防护屏; γ射线屏蔽 | |||
| 伽马射线防护屏; 伽马射线屏蔽层 | |||
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gamma shield : 1 phrase in 1 subject |
| Technology | 1 |
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