| |||
| 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 in 2 subjects |
| Mining | 2 |
| Technology | 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 in 2 subjects |
| Mining | 2 |
| Technology | 2 |