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| 光谱 | |||
| 光学光谱; 光功率谱 | |||
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| 光学光谱; 光谱; 光功率谱 | |||
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| 光谱 | |||
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optical spectrum : 32 phrases in 10 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Earth sciences | 3 |
| Electronics | 6 |
| General | 1 |
| Geology | 2 |
| Oil / petroleum | 1 |
| Space | 4 |
| Technology | 12 |
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