Результаты (
английский) 2:
[копия]Скопировано!
Electrical methods have a high degree of extraction, the most common (90% of the resulting nickel), but the most expensive.
chemical vapor deposition
process chemicals
after treatment remains a huge amount of sludge
The same flaw in the method of coagulation-flocculation
simple
membrane filtration requires a high pressure
membrane filtration must be high pressure.
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