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| автоматическая запись; механическая запись | |||
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| механическая звукозапись | |||
| механическая запись (кривой) | |||
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enrégistrement mécanique : 8 phrases in 5 subjects |
| Chemistry | 1 |
| Metallurgy | 4 |
| Patents | 1 |
| Radio | 1 |
| Technology | 1 |
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