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| 电子密度 | |||
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electron density : 35 phrases in 10 subjects |
| Aviation | 2 |
| Chemistry | 4 |
| Earth sciences | 1 |
| Electronics | 9 |
| Engineering geology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 6 |
| Technology | 8 |
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