Plane warping deformation and interior hole oval deformation occur easily for spread bevel gear at carburization and hardening.
螺旋伞齿轮在渗碳淬火时极易发生平面翘曲变形和内孔椭圆化变形。
But in single loudspeaker, double loudspeaker linear center, the oval curve is in plane wiring is essential linear one.
而在单喇叭、双喇叭的线形中，卵形曲线是在平面布线不可缺少的线形之一。
Use of rotational inertia of the definition of calculated rigid oval ring around the ring with the vertical plane through the central axis and the moment of inertia.
运用转动惯量定义式直接计算出椭圆环刚体绕垂直与环平面且通过中心轴的转动惯量。
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