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