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3ω法
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3 ω method
3ω法
通过给予被测样品直接接触的感温器中施加频率为1ω的交变电流,探测和分析感温器中频率为3ω的谐波电压信号,获取被测材料热导率、比热容和热扩散率等热物理性质的一种测量方法。
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education financed by religious assets
Education-first Model of China's Social Work Development
education for all
Education for All Handicapped Children Act of 1975
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