Os Elementos Químicos - Nióbio
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6:30
Os Elementos Químicos - Molibdênio
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12:38
Os Elementos Químicos - Flúor
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10:43
What they didn't tell you about NIOBIO!
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8:04
Os Elementos Químicos - Ítrio
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25:45
Matéria de Capa | Grafeno | 24/03/2018
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39:44
HISTÓRIA DO NIÓBIO NO BRASIL - Memórias das minas
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7:41
What is TITANIUM? TITANIUM: the most resistant metal in the world. The uses of TITANIUM in industry
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20:07