a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite.
一种坚有
泽的灰色金属元素,抗腐蚀性极
,见于铌铁矿、褐钇铌矿和钽铁矿
。
a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite.
一种坚有
泽的灰色金属元素,抗腐蚀性极
,见于铌铁矿、褐钇铌矿和钽铁矿
。
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