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| 低层的 | |||
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| 终端设备的低层 | |||
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lowest layer : 46 phrases in 12 subjects |
| Air defense | 1 |
| Aviation | 3 |
| Desert science | 1 |
| Earth sciences | 7 |
| Ecology | 1 |
| Electronics | 8 |
| Geology | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 8 |
| Technology | 12 |
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