cone of ray

美英加陆军规格_馆档网 ... "圆锥台"," cone frustum" "射线锥"," cone of ray" "直圆锥"," cone of revolution" ...

図学辞书(简易版) - 日本図学会_馆档网 ... 光源 point source of light;light source 光锥 cone of ray 光线 ray of light ...

図学辞书 - 日本図学会... ... 光线消点 ray's vanishing point 光线锥 cone of ray 光线柱 cylinder of ray;prism of light. ...