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| |||
| cogged bit; finger bit | |||
| basket bit; saw bit (для разбуривания деревянных пробок в скважинах) | |||
| зубчатая коронка: 21 phrases in 10 subjects |
| Automated equipment | 1 |
| Construction | 3 |
| Drilling | 1 |
| Electronics | 2 |
| Geology | 1 |
| Makarov | 1 |
| Mining | 3 |
| Oil / petroleum | 6 |
| Oil and gas | 2 |
| Technology | 1 |