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