 |
| |||
| Wohlwill (MichaelBurov); Wohlwill process for gold (MichaelBurov); Wohlwill process (increases purity to about 99.99 percent by electrolysis MichaelBurov) | |||
| электролитическое рафинирование золота: 4 do fraz, 1 tematyki |
| Wydobywanie złota | 4 |
|
| |||
| Wohlwill (MichaelBurov); Wohlwill process for gold (MichaelBurov); Wohlwill process (increases purity to about 99.99 percent by electrolysis MichaelBurov) | |||
| электролитическое рафинирование золота: 4 do fraz, 1 tematyki |
| Wydobywanie złota | 4 |