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作者由流体力学基本方程把求解流动阻力式归纳起来．其目的便于实际工作者一则理解基本方程实质条件；二则利用基本方程求解阻力；三则经过计算来设计改进减少阻力的有关设备形状；四则通过实践和理论方程条件来求得所使用的某设备流动阻力的实践公式．１ 流体力学基本方程１
The author summed up the solution of flow resistance by the basic equations of fluid mechanics. The purpose is to facilitate the practical workers to understand the essential conditions of the basic equations; the second is to use the basic equations to solve the resistance; the third is designed to improve the shape of the device to reduce the resistance; and the other is to obtain the Practical formula of equipment flow resistance. 1 basic equations of fluid mechanics 1