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powder metallurgy alloy steels
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powder metallurgy alloy steels
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粉末冶金材料
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powder metallurgy alloy steels
粉末冶金合金钢
采用热等静压或热挤压等热成形技术,将合金钢粉末致密化成坯材,然后经一般热塑性加工制成的合金钢材。
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