- refrigerated zone
- refrigerating capacity
- refrigerating device
- refrigerating influence
- refrigerating plant
- refrigeration actuation
- refrigeration building
- refrigeration compressor
- refrigeration industry
- refrigeration losses
- refrigeration method
- refrigeration panel
- refrigeration practice
- refrigeration source
- refrigeration theory
- refrigerationist
- refrigerator barge
- refrigerator deodorizer
- refrigerator temperature
- refrigerator-warmer
- regenerative adsorption
- regenerative braking
- register
- regression analysis
- regular reflexion
- regulated heat
- remote reading
- remote sensing
- remote-acting
- remote-indicating
- removable
- renormalizability
- renormalizable
- renormalization
- renormalization group
- reorientation
- repeatability
- repeated compression
- repeated condensation
- repeated evaporation
- repetitive error
- replacement air
- regulating winding
- reheat
- reinforced plastic
- relative
- relative age
- relative dispersion
- relative relation
- relativistic aberration
- relativistic electrodynamics
- relaxation
- relaxation approximation
- relaxation oscillator
- release time
- released heat
- relic radiation
- relief cooling
- reliquefaction
- repeater
- repeater section
- repeating coil
- replaceable filter
- replica
- reprecipitate
- representative scale
- reprocess
- reproducibility
- reproduction factor
- reproductivity
- repulsive potential
- reradiate
- reradiation
- rerouting
- rescap
- research satellite
- reserve bars
- reserve battery
- reset action
- resetting
- residential cooling
- residential humidification
- residual air
- residual charge
- residual effect
- residual elasticity
- residual gas
- residual heat
- residual radiation
- residual ray
- resistance
- resistance commutation
- resistance grounding
- resistance heating
- resistance loss
- resistance measurement
- resistance meter
- resistive
- resistive losses
- resolvent