为了研究轴对称回转体水下航行器模型所受到的壁面摩擦阻力，设计并实施了一套测试系统。
A testing system was designed and implemented to figure out the friction drag of an underwater axisymmetrical vehicle model.
超空泡减阻机理的研究表明：超空泡不仅可以减小回转体的摩擦阻力，还可以减小回转体的压差阻力。
Research on drag reduction mechanism of supercavitation shows that supercavitation can reduce not only the friction drag coefficient but also the pressure drag coefficient.
切削刀具的切削力及密封圈回转摩擦力的初步分析计算。
A primary analysis for cutting force of the tools and the frictional force in rotating seal ring are also given.
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