Vaizdo įrašo peržiūrai ir taisyklingam svetainės
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nepasiekiamas
16+
Francois Pellier
Prie parankinių
Pridėtas
HD
12 minučių
The video blog focuses on the chemistry of various precious metals and much more. Under different headings, you can watch videos on how the author purifies and determines samples of initial contacts in order to extract silver 920. He also tells how to determine gold in quartz-pyrite gold-bearing ores, create the legendary red gold 585, and more.