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| Торец пера (Coaleater) | |||
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| поверхность вершин (зубьев) | |||
| поверхность вершин зубьев | |||
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Tip surface : 7 phrases in 3 subjects |
| Astronautics | 1 |
| Combustion gas turbines | 2 |
| Dentistry | 4 |
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