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| aktives Lasermedium; Lasergas n | |||
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laser gas : 20 phrases in 8 subjects |
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| Construction | 1 |
| Earth sciences | 5 |
| Electronics | 4 |
| Medical appliances | 1 |
| Natural resourses and wildlife conservation | 1 |
| Optics branch of physics | 6 |
| Technology | 1 |
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