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碳氮共渗
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碳氮共渗
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carbonitriding
碳氮共渗
奥氏体状态下(800~880℃),在工件表面同时渗入氮、碳元素,且以渗碳为主的化学热处理工艺。
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Qianshan City Museum
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Qianshan Scenic and Historic Area
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Qianshu State
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Qiantangjiangian Stage
Qiantangjiang river seawall
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