 |
| |||
| seat guide (MichaelBurov); valve seat guide (MichaelBurov) | |||
| gate valve seat; seat | |||
| gate seat | |||
| седло задвижки: 37 do fraz, 4 tematyki |
| Elementy maszyn | 25 |
| Ropa / ropa naftowa | 4 |
| Technika i technologia | 5 |
| Technologia ropy i gazu | 3 |
|
| |||
| seat guide (MichaelBurov); valve seat guide (MichaelBurov) | |||
| gate valve seat; seat | |||
| gate seat | |||
| седло задвижки: 37 do fraz, 4 tematyki |
| Elementy maszyn | 25 |
| Ropa / ropa naftowa | 4 |
| Technika i technologia | 5 |
| Technologia ropy i gazu | 3 |