The macrostructure and microstructure of the solidified samples was observed by digital camera and optical microscopy, respectively.

利用光学显微镜和数码相机对凝固试样的宏观及微观组织进行观察。

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The cracking encapsulated roller in use was analyzed by means of chemical composition, macrostructure and microstructure examination and mechanical property test.

采用化学成分分析、宏观和微观组织检验以及力学性能测定等方法对在使用过程中发生开裂的包胶辊进行了分析。

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The reason of arc crack on retarder gear surface was analyzed by means of chemical composition analysis, hardness testing, macrostructure and microstructure examination.

通过化学成分分析、硬度试验、宏观和微观检验等方法，对减速机齿轮齿面弧形裂纹的产生原因进行了分析。

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