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| β 射线密度测量计 | |||
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| β 射线测厚仪 | |||
| beta -gauge: 14 phrases in 8 subjects |
| Construction | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Metallurgy | 3 |
| Mining | 1 |
| Plastics | 2 |
| Shipbuilding | 2 |
| Technology | 3 |
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