Niobium Hlau
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Niobium Hlau
R04200 - Hom 1, Reactor qib unalloyed niobium;
R04210 - Hom 2, qib lag luam tsis muaj niobium;
R04251 -Type 3, Reactor qib niobium alloy muaj 1% zirconium;
R04261 -Type 4, Kev lag luam qib niobium alloy muaj 1% zirconium;
