| |||
| coring bit | |||
| coring drilling bit; cutting head | |||
| cutter head; core bit; core-cutting head; core-drilling bit | |||
| core drill bit; core-drill bit | |||
|
колонковое буровое долото : 19 a las frases, 3 temas |
| Campos de petróleo | 1 |
| Petróleo | 14 |
| Petróleo y gas | 4 |
| |||
| coring bit | |||
| coring drilling bit; cutting head | |||
| cutter head; core bit; core-cutting head; core-drilling bit | |||
| core drill bit; core-drill bit | |||
|
колонковое буровое долото : 19 a las frases, 3 temas |
| Campos de petróleo | 1 |
| Petróleo | 14 |
| Petróleo y gas | 4 |