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Relation: subclass

Device115A Device is an Artifact whose purpose is to serve as an instrument in a specific subclass of ...^
ElectricSpeakerDevice2A combination SpeakerDevice and ElectricDevice.^
WearableItem8WearableItem is the subclass of Artifacts that are made to be worn on the body.^
    Earphone.Earphone is a type of Device that that converts electric signals into sound and is usually held...^

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