不同材料硬度对比Which one of the following materials has the highest
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不同材料硬度对比
Which one of the following materials has the highest hardness?
一下那种材料的硬度最高?
alumina ceramic 氧化铝
gray cast iron 灰口铸铁
hardened tool steel 硬化钢
polystyrene 聚苯乙烯
Which one of the following materials has the highest hardness?
一下那种材料的硬度最高?
alumina ceramic 氧化铝
gray cast iron 灰口铸铁
hardened tool steel 硬化钢
polystyrene 聚苯乙烯
alumina ceramic 氧化铝
Which one of the following materials has the highest modulus
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