BRPI0206417B1 - Tarugos de tântalo e nióbio e métodos …
BRPI0206417B1 BRPI0206417-0A BR0206417A BRPI0206417B1 BR PI0206417 B1 BRPI0206417 B1 BR PI0206417B1 BR 0206417 A BR0206417 A BR 0206417A BR PI0206417 B1 BRPI0206417 B1 BR PI0206417B1 Authority BR Brazil Prior art keywords tantalum billet niobium extruded diameter Prior art date Application number BRPI0206417-0A
Lee mas