| |||
| 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 phrases, 2 sujets |
| Exploitation minière | 2 |
| Technologie | 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 phrases, 2 sujets |
| Exploitation minière | 2 |
| Technologie | 2 |