以下为句子列表：
英文: By means of chemical composition analysis, hardness testing, non-metallic inclusion examination, metallographic examination, macro and micro-fractography fracture analysis were conducted.
中文: 对剃齿刀断口进行了宏、微观检验、化学成分分析、硬度测试和非金属夹杂物及显微组织检验。
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英文: From macroscopical to microcosmic, from qualitative to quantitative, from fracture surface analysis in fracture failure to fractography about mechanism, it stated position and function of fracture surface analysis in fracture failure analysis and introduc
中文: 摘要从宏观到微观、从定性到定量、从断裂失效的断口分析到机理研究的断口学，阐述断口分析在断裂失效（事故）分析中的地位和作用，介绍断口分析的内容及其依据、基本技能和方法，著重说明断口学的发展和微观断裂机理的研究。
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