average temperature gradient
average temperature gradient
平均温度梯度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The results are as follows: at low velocity, the heat transfer coefficient is nearly proportional to the average velocity and velocity and temperature gradient are in good synergy.
结果表明：当流速很低时，速度与换热系数几乎成线性变化，场的协同性很好；
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