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