 |
| |||
| four-cone rock drilling bit; quadricone rock drilling bit; four-cutter rock drilling bit | |||
| четырёхшарошечное буровое долото: 3 phrases in 2 subjects |
| Oil / petroleum | 2 |
| Oilfields | 1 |
|
| |||
| four-cone rock drilling bit; quadricone rock drilling bit; four-cutter rock drilling bit | |||
| четырёхшарошечное буровое долото: 3 phrases in 2 subjects |
| Oil / petroleum | 2 |
| Oilfields | 1 |