文章结合编程实例介绍了球弧数控车削三种常用的工艺方法，即车圆法、移圆法、车锥法。
This paper introduces three kinds of CNC turning method combined with practical example, concentric circle turning, center shifting turning and taper profile composition turning.
螺旋沟槽的轴向法向截面形状可以是U型、梯型、弧型或三角型。
The axial normal sections of the spiral grooves can present U shape, trapezoid, arc or triangle.
积分方程法使埋弧炉三维磁场计算成为可能。
The integral equation method makes the calculation of 3d magnetic field in electric furnaces (EF) possible.
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