Analysis of the Stem-fillet blend fracture of exhaust valve was conducted by means of macroexamination, microstructure examination, chemical composition analysis and hardness test.
摘要
用宏、微观检验、
学成
和硬度测试等方法对断头的排
行了。
Analysis of the Stem-fillet blend fracture of exhaust valve was conducted by means of macroexamination, microstructure examination, chemical composition analysis and hardness test.
摘要用宏、微观检验、学成和硬度测试等方法对断头的排行了。
Research on the failure reasons of the cooling tube were carried out by means of macroexamination, thickness measurement, X ray diffraction, optical microscopy and chemical analysis.
用宏、微观、学成等手段,对冷却水管的腐蚀穿孔行了失效。
声明：以上例句、词性
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