비디오 정보 Precious Metals
precious metals (11)
jewelry (89)
copper (100)
scrap (41)
gold recovery (12)
diy (1746)
smelting (11)
polishing (29)
diy jewelry (21)
soldering (144)
jewellery (39)
jewellery making (11)
jewelry making (34)
mining (61)
gold panning (14)
casting (94)
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