base metals
(physics) A rare stable isotope of argon, ³⁶₁₈Ar, having eighteen protons and eighteen neutrons; it amounts to about 0.3% of the element in nature
plural of bur
plural of base metal
present participle of ghess
製錬所ではしばしば銅やニッケルなどの非貴金属を加工して工業用合金を製造します。
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