 |
| |||
| trenching study (Andy) | |||
| trenching | |||
| channel sampling (vbadalov); sampling channel sampling | |||
| channel sampling (по способу отбора MichaelBurov); trench sampling (по способу отбора MichaelBurov) | |||
|
бороздовое опробование : 4 do fraz, 1 tematyki |
| Wydobywanie złota | 4 |