B dx C 4、推导公式 (Derivation of formula) 此式为薄壁筒扭转时横截面上切应力的计算公式. 此式为薄壁筒扭转时横截面上切应力的计算公式.
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Process of calculation and derivation of formula for process of gas burning and the theories of jet current are listed.
比较详细的列出了燃气燃烧过程和射流理论的计算过程和公式推导；
The result of the example shows that this method is sufficiently accurate. The hypothesis in the derivation of formula and…
给出了公式推导中的假设和公式适用的条件，并对一些问题进行了讨论。
The derivation of formula and the analysis of related parameters are made for the mask method. The errors introduced by mask method are calculated.
对掩模法进行了公式推导及相关参数的分析确定，并对掩模法所能引起的误差进行了估算。
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