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Metallurgy
Metallurgy
(2)
Technological sciences
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Engineering
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Mechanical engineering
> Metallurgy
Metallurgy engineering
(1)
A fémek szerepe, jelentősége, felfedezésük
mindentudas
Dr. Prof. András Roósz
10 years ago - 37:31
A digitális kompetencia gyermekkori fejlesztése
Márta Kőrösné Mikis
13 years ago - 18:26