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