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