Peu de gens connaissent cette méthode de chromage pas cher ! Faites-le vous-même dans un atelier
12:20
Few people know these methods of protective coating! Simple practical inventions
59:28
ANODIZING ALUMINUM - Breaking Bad -subtitles
18:47
DRAW on Metal WITHOUT a Laser!
12:33
How to make copper plating by using water Without Electricity!Science Project, Practical invention
26:09
Testing New SUPER LASERS... These will take over the maker industry!
23:37
Don't throw away Old Batteries!Genius Invention with Welding Machine that you won't Believe😱
9:15
SIMPLE tech. Battery draws on metal
20:36