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Zertifizierung : 17 phrases in 10 subjects |
| Agriculture | 1 |
| Earth sciences | 1 |
| Economics | 2 |
| Education | 1 |
| Environment | 1 |
| Industry | 2 |
| Information technology | 1 |
| Metallurgy | 1 |
| Microsoft | 2 |
| Technology | 5 |
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