roll - satu
- route relay interlocking
- route releasing
- route sketch
- route speed
- router
- routine compiler
- routine firing
- routine inspection
- routine launching
- routine maintenance
- routine monitoring system
- routine order
- routine test
- routine training
- roving
- roving gun
- roving gun location overlay
- roving package
- roving probe
- roving radar
- row of minefield
- royal aircraft establishment
- royal armament research and development dstablishment
- royal auxiliary air force
- royal canadian air force association
- royal flying doctor service of australia
- royal navy aircraft
- royal radar establishment
- rubber
- rubber base fuel
- rubber blanket
- rubber block track
- rubber engine
- rubber fabric
- rubber fabric tank
- rubber grip
- rubber hose
- rubber repair patch
- rubber ring
- rubber solvent petrol
