protractor head
相关英语词汇推荐
- frequency summing
- upper state relaxation
- visible emissivity
- metacrystalline
- optical head controllers,control ics/modules
- astrospectrograph camera
- optical harmonic generation
- optical deformation
- multilongitudianl-mode laser
- chronophotography
- push out
- intensifying screen
- mode pattern
- geometrical focus
- infra-red beam folower
- diatomic roto
- Varotal lens
- time-averaged shadow-moire method
- holographic gratings
- filters