| |||
| coring bit | |||
| coring drilling bit; cutting head | |||
| cutter head; core bit; core-cutting head; core-drilling bit | |||
| core drill bit | |||
|
колонковое буровое долото : 19 phrases in 3 subjects |
| Oil / petroleum | 14 |
| Oil and gas | 4 |
| Oilfields | 1 |
| |||
| coring bit | |||
| coring drilling bit; cutting head | |||
| cutter head; core bit; core-cutting head; core-drilling bit | |||
| core drill bit | |||
|
колонковое буровое долото : 19 phrases in 3 subjects |
| Oil / petroleum | 14 |
| Oil and gas | 4 |
| Oilfields | 1 |