roll - satu
- rotor recovery system
- rotor reel system
- rotor thrust in the ground cushion
- rotor type landing
- rotten bag
- rotten wood
- rough area landing
- rough combustion
- rough engine
- rough ground
- rough landing
- roughness ratio
- round
- round arch
- round bottomed half cone craft
- round fabric hose
- round head screw
- round layout
- round nut
- round off accumulator
- round set up
- round tip fin
- round to round scatter
- round trip to the moon
- roundabout route
- rounded nose missile
- rounds per gun per minute
- rounds per launcher
- rounds/minute
- roundtrip trajectory
- route
- route card
- route control
- route control system
- route handle
- route key
- route meteo
- route mining plan
- route of mine field
- route reconnaissance
