| |||
| метод Фраша (a method to extract sulfur from underground deposits MichaelBurov) | |||
|
Frasch process : 2 phrases in 1 subject |
| Technology | 2 |
| |||
| метод Фраша (a method to extract sulfur from underground deposits MichaelBurov) | |||
|
Frasch process : 2 phrases in 1 subject |
| Technology | 2 |