(subclass RefinedPetroleumProduct PetroleumProduct) | Economy.kif 5929-5929 | |
(subclass LiquefiedPetroleumGas RefinedPetroleumProduct) | Economy.kif 5933-5933 | |
(subclass PetroleumLubricant RefinedPetroleumProduct) | Economy.kif 5935-5935 | |
(subclass Asphalt RefinedPetroleumProduct) | Economy.kif 5953-5953 |