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| onda quadrata; onda quadra | |||
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square wave : 25 phrases in 8 subjects |
| Communications | 2 |
| Earth sciences | 3 |
| Electronics | 15 |
| Industry | 1 |
| Information technology | 1 |
| Life sciences | 1 |
| Natural sciences | 1 |
| Vacuum tubes | 1 |
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