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