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Sigma KEE - Screwdriver

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(documentation Screwdriver EnglishLanguage "A Device that is used to rotate a Screw, which by the action of its helical threads is driven into a medium that is softer than the material of the screw itself.") Mid-level-ontology.kif 4669-4671
(subclass Screwdriver Device) Mid-level-ontology.kif 4668-4668


    (instance ?D Screwdriver)
    (hasPurpose ?D
        (exists (?R ?S)
                (instance ?R Rotating)
                (instrument ?R ?D)
                (patient ?R ?S)
                (instance ?S Screw)))))
Mid-level-ontology.kif 4673-4681

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