... external text 外部文本,外部正文... external thermal resistance 外热阻... external thread 外螺纹;阳螺纹...
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对PQFP在机载恶劣环境下的稳态热性能进行了研究，分析了影响元件内、外热阻的各种因素。
The steady thermal performance of PQFP was studied under harsh environment, and factors effecting on the inner and outer thermal resistances were analyzed.
在利用热边界层减阻的电加热管道中，为了计算管道加热的热流量，除了热边界层流动的流体传热外，还需考虑整个管道的热损失。
The many kinds of heat losses of fluid flow on the temperature boundary layer in pipeline are a part of the total heat flux.
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