multi-layer phase structure
multi-layer phase structure
多层相结构
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The nitride layer was formed on the surface of ductile cast iron by gas multi-element penetration, and the phase structure and section appearance of nitride layer were analyzed by the XRD and SEM.
球墨铸铁经过气体多元共渗后可在其表面形成氮化层，通过X射线衍射和扫描电镜对渗层的相结构与形貌进行分析。
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