hyperboloid surface中文什么意思

例句与用法

1. the directrixes of the in former two transmissions are the loxodrome and the geodesic on the pitch cones, that of the latter is an equal-pitch line along the direction of straight generatrixes in the hyperboloid surface, also is the vertical trajectory of the straight generatrixes
   前两种传动形式的准线分别为节锥面上的斜航线与测地线，后者的准线为单叶双曲面上沿直母线方向的等螺距曲线，且为直母线族的正交轨线。