rive - rota
- roof lance furnace
- roof lance heat
- roof lancing
- roof pressure
- roof restraining system
- roof ring
- roof rise
- roof segment lining
- roof slew
- roof swinging mechanism
- roof tuyere
- roof-cleaning fan
- roof-temperature control
- roof-temperature controller
- roof-temperature indicator
- roofing sheet
- room scattering
- room temperature
- room-temperature ageing
- room-temperature bending