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| avoin piiri | |||
| avoin virtapiiri | |||
| avoin systeemi | |||
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| avoin jäähdytys | |||
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open-circuit : 49 phrases in 10 subjects |
| Accumulators | 3 |
| Communications | 15 |
| Earth sciences | 2 |
| Electric motors | 4 |
| Electronics | 11 |
| Information technology | 2 |
| Isolation | 2 |
| Mechanic engineering | 8 |
| Metallurgy | 1 |
| Transformers | 1 |