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duração de vida : 17 phrases in 11 subjects |
| Accumulators | 1 |
| Economy | 3 |
| Electric machinery | 1 |
| Electronics | 1 |
| Isolation | 2 |
| Lighting other than cinema | 3 |
| Medical | 2 |
| Metallurgy | 1 |
| Natural sciences | 1 |
| Semiconductors | 1 |
| Statistics | 1 |
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