How much gold in 1kg test pcb contact pins / recovery with Acid Peroxide / refining full processing
Hello, friends! This video shows how to extract gold from test probes pins. -recovery and refining and smelting-Channel development / support: https://www.paypal.com/cgi-bin/webscr... Subscribe my channel: / @qwethengoldrecovery #goldrecovery #probepins #refining
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