金属材料的显微组织直接影响到机械零件的性能和使用寿命，金相分析是控制机械零件内在质量的重要手段。
The microcosmic structure of metal material directly influence to the capability and useful life of mechanism accessory. Metallography analyzing is the important means of controlling inhesion quality.
金属材料的显微组织直接影响到机械零件的性能和使用寿命，金相分析是控制机械零件内在质量的重要手段。
The microcosmic structure of metal material directly influence to the capability and useful life of mechanism accessory. Metallography analyzing is the important means of controlling inhesion quality.
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