Secondly, in conditions of non-steady flow, azinuthal velocity and shear stress distribution were deduced according to function approximation method.
在非稳流下，采用函数拟合法，得出流体切向速度随半径变化的表达式及流体所受切向剪切力和分布曲线。
The following devices can be ordered: 1, digital display device; 2, CNC vertical lathe can be equipped with a function of turning in steady velocity.
特殊定货：可提供下列装置：1、数显装置；2、数控立车可带恒速切削。走刀系统均为伺服电机控制。
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