(subclass RefinedPetroleumProduct PetroleumProduct) | Economy.kif 5929-5929 | Refined petroleum product is a subclass of petroleum product |
(subclass LiquefiedPetroleumGas RefinedPetroleumProduct) | Economy.kif 5933-5933 | Liquefied petroleum gas is a subclass of refined petroleum product |
(subclass PetroleumLubricant RefinedPetroleumProduct) | Economy.kif 5935-5935 | Petroleum lubricant is a subclass of refined petroleum product |
(subclass Asphalt RefinedPetroleumProduct) | Economy.kif 5953-5953 | Asphalt is a subclass of refined petroleum product |