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(subclass DCPowerSource PowerSource) Mid-level-ontology.kif 2538-2538 DC power source is a subclass of power source
(subclass Battery DCPowerSource) Mid-level-ontology.kif 2540-2540 Battery is a subclass of DC power source
(subclass DevicePowerSupply DCPowerSource) ComputingBrands.kif 3523-3523 Device power supply is a subclass of DC power source

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