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| 光学仪器组合 | |||
| 光学仪器设备 | |||
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| 光学仪器设备 | |||
| optical instrumentation: 9 phrases in 6 subjects |
| Aviation | 1 |
| Earth sciences | 2 |
| Electronics | 1 |
| Geophysics | 1 |
| Oil / petroleum | 1 |
| Space | 3 |
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