网络释义
1)plane principal focal,主焦平面2)plane,principal focal,主焦平面3)principal focal plane,主焦平面4)main focal spot,主焦斑5)apocenter,apofocus,远主焦点6)primary focus,principal focus,principal focus point,Focus,principal,point of.,主焦点<光>7)prome coking coal,主焦煤8)apocenter,远主焦点9)apofocus,远主焦点10)primary anxiety,主焦虑