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