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| β 射线测厚仪 | |||
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ray gauge : 35 phrases in 8 subjects |
| Aviation | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Metallurgy | 23 |
| Physics | 1 |
| Plastics | 2 |
| Shipbuilding | 2 |
| Steel production | 1 |
| Technology | 3 |
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