unpr - vari
- unprecise concentrator
- unprecise&255 concentrator
- unsteady discharge
- unsteady flow
- unsteady phenomenon
- unused photon
- upflow anaerobic reactor
- upgraded metallurgical grade silicon
- upgraded silicon
- upper head assembly
- upper surface
- upstream
- uranium enrichment
- urban solar cooker
- usage
- use
- useful energy gain
- useful life
- useful solar heat
- useful volume
- utilities
- utility
- utility-installed photovoltaic facility
- utility-interactive photovoltaic generation
- utilizability function
- utilization
- utilization factor
- V-corrugated insulation
- V-groove solar cell
- V-grooved emitter
- V-trough concentrator
- V-trough solar concentrator
- vacancy
- vacuum
- vacuum absorber
- vacuum deposition process
- vacuum distillation
- vacuum ice
- vacuum jacket
- vacuum lamination
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