A simplified calculating method is also presented based on oil-bearing saturation formula and experience formula.
以含油饱和度公式为基础，结合经验公式，提出了简化计算方法。
According to the measurement and analysis of natural vibration characteristics of tube heater, a simplified calculating method and empirical formulae were suggested.
根据管式加热炉结构和动力特征的实测结果，提出了简便的计算方法和经验公式。
A simplified theoretical method for calculating tandem propellers is presented in this paper.
本文提出了一个串列螺旋桨的简化理论计算方法。
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