NJG型真空激光准直系统
NJG vacuum laser alignment System
大视场准直光学系统
large field collimating optical system
倒置激光准直望远镜
inverse collimation telescope
非准直光学系统
Misaligned optical system
激光准直测量
laser alignment measurement
laser collimating measurement
激光准直法
method of laser alignment