 |
| |||
| Frasch (bse.sci-lib.com/article117496.html Jespa); Frash method (добычи серы); Frasch process (a method to extract sulfur from underground deposits MichaelBurov) | |||
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метод Фраша : 4 do fraz, 2 tematyki |
| Górnictwo | 2 |
| Technika i technologia | 2 |
|
| |||
| Frasch (bse.sci-lib.com/article117496.html Jespa); Frash method (добычи серы); Frasch process (a method to extract sulfur from underground deposits MichaelBurov) | |||
|
метод Фраша : 4 do fraz, 2 tematyki |
| Górnictwo | 2 |
| Technika i technologia | 2 |