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| annular gear; internal gear; annulus | |||
| annular wheel; gear with internal teeth (translator911) | |||
| internal-toothed wheel; internal wheel | |||
| шестерня с внутренним зацеплением: 7 phrases in 4 subjects |
| Armored vehicles | 1 |
| Automobiles | 3 |
| Mechanic engineering | 2 |
| Nautical | 1 |