光杠杆 opticing lever ; light lever

激光光杠杆 laser light lever

光杠杆镜尺组 optical lever mirror unit

激光器杠杆 laser levver

杠杆式光学比较仪 microlux

光学灵敏杠杆 Optics sensitive lever

激光丝杠检查仪 lead screw laser tester