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atomic number 41
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  • n. a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium

    同义词: niobium Nb

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    英英释义

    atomic number 41

    n.a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium

    同义词:niobiumNb




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