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