二次曲面的共轭直线
conjugate line in a quadric
二次曲线的共轭直线
conjugate lines in a conic
直线共轭内啮合齿轮泵
straight conjugate internal gear pump
二次曲线的共轭直径
conjugate diameters of a conic
曲线直线化
approximate nonlinear method
永磁直线直流无刷电动机
linear permanent magnet brushless DC motor
直线共振加速器
linear resonance accelerator