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| スイッチ回路 | |||
| circuito di: 25 phrases in 7 subjects |
| Electric motors | 2 |
| Electricity generation | 5 |
| Electronics | 4 |
| Piezoelectric crystals | 1 |
| Power system protection | 1 |
| Telecommunications | 8 |
| Telegraphy | 4 |
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