英语语法分析

The fractograph and dislocation were observed with SEM and TEM.

利用SEM观察疲劳断口和TEM观察位错形貌。

The fractograph and dislocation morphology were observed by means of SEM and TEM.

利用SEM观察疲劳断口和TEM观察位错形貌。

The reason of roll fracture has been analyzed by means of chemical composition analysis, macro fractograph, low magnification structure and microstructure examination.

采用化学成分、宏观断口、低倍组织及金相组织等分析方法对轧辊断裂原因进行了分析。