reco - rele
- recovered oil
- recovery
- recovery point
- red smoke
- reduced crude
- reduced oil
- reducing flame
- reduction ratio
- reduction table
- reference conditions
- reference data
- reference fuel
- reference gasoline
- reference level
- reference point
- reference sample
- reference standard
- reference substance
- reference table
- refinery
- refinery gas
- refinery sludge
- refinery stock
- reflux
- reflux number
- reflux ratio
- reformulated gasoline
- refractory quality
- regenerative cooling
- Registration, Evaluation, Authorization and Restriction of Chemicals
- Reid vapour pressure
- relative density
- relative intensity
- relative viscosity
- relay tank
