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钪改性的铝合金是一类高性能新型铝合金。
Scandium-modified Al alloys are a new kind of high performance alloys.
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含铁类合金中的基本或主要金属是铁质。
Ferrous alloys are those in which the base or primacy metal is iron...
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含铁类合金中的基本或主要金属是铁质。
Ferrous alloys are those in which the base or primacy metal is iron...
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