English translation for "第二光学系统"

secondary optical system

Similar Words：

"第二股空气孔" English translation, "第二股气流" English translation, "第二挂港" English translation, "第二观察孔" English translation, "第二管事" English translation, "第二光轴" English translation, "第二轨道会议" English translation, "第二滚筒" English translation, "第二国际" English translation, "第二海务大臣" English translation