volume hologram memory
体积全息图存储器

• roughness
• roughnessmeter
• roughness spectrum
• roughoeter
• rough plan
• rough service lamp
• rough surface
• roulette
• round
• round guide
• rounding error
• rounding of corner
• rounding off
• roundness
• round-segment fused bifocal construction
• round-segment multifocal
• round-trip gain
• round-trip transit time
• round waveguide
• Rousseau diagram
• route surveying
• routine suitability
• routine test
• rovibronic transition
• row