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| gage (MichaelBurov); gauge (MichaelBurov) | |||
| bit size; bit diameter | |||
| hole size (MichaelBurov) | |||
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диаметр долота : 77 do fraz, 9 tematyki |
| Geologia | 1 |
| Górnictwo | 3 |
| Olej i gaz | 22 |
| Pola naftowe | 11 |
| Ropa / ropa naftowa | 25 |
| Sachalin | 1 |
| Sachalin r | 1 |
| Technologia ropy i gazu | 6 |
| Wiercenie | 7 |