 |
| |||
| 技术套管 | |||
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protector casing : 12 do fraz, 4 tematyki |
| Mechanika | 1 |
| Ropa / ropa naftowa | 2 |
| Technika i technologia | 6 |
| Wiercenie | 3 |
|
| |||
| 技术套管 | |||
|
protector casing : 12 do fraz, 4 tematyki |
| Mechanika | 1 |
| Ropa / ropa naftowa | 2 |
| Technika i technologia | 6 |
| Wiercenie | 3 |