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| Zeitfeld n | |||
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time field : 10 phrases in 9 subjects |
| Agriculture | 1 |
| Communications | 1 |
| Electronics | 1 |
| High energy physics | 2 |
| Optics branch of physics | 1 |
| Radio | 1 |
| Technology | 1 |
| Telecommunications | 1 |
| Transport | 1 |
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