It's introduced in this paper how to draw the engineering drawing of the plow surface formed by a combination of a oblique helicoid and a hyperboloid of one sheet.
本文介绍由斜螺旋面和单叶双曲面组成的犁面在犁面主参数确定后的工程作图法。
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Transition to the three-dimensional space, then we obtain the equation of equipotential surface families of charged conductor with surface of hyperboloid of one sheet.