Chemical composition analysis, mechanical property test and microstructure examination were used to analyze the early fracture of power plant's turbine main oil pump shaft.
采用化学分析、力学性能测试和金相检验等手段，对某电站汽轮机主油泵轴的早期断裂进行了分析。
The main factors affecting heat wave property of burning crude oil are its composition and water content in oil.
原油组分和含水率是影响原油热波特性的重要因素。
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