 |
| |||
| bit teeth with hemispherical working surface | |||
| drilling bit teeth with hemispherical working surface | |||
| зубья долота с полусферической рабочей поверхностью: 1 phrases, 1 sujets |
| Champs de pétrole | 1 |
|
| |||
| bit teeth with hemispherical working surface | |||
| drilling bit teeth with hemispherical working surface | |||
| зубья долота с полусферической рабочей поверхностью: 1 phrases, 1 sujets |
| Champs de pétrole | 1 |