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   BallBearing
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| appearance as argument number 1 |
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| (documentation BallBearing EnglishLanguage "A small Metal Sphere designed for use in applications where it is desirable to reduce friction between two parts.") | Cars.kif 1406-1407 | |
| (subclass BallBearing Device) | Cars.kif 1404-1404 | 子類 BallBearing and Device |
| appearance as argument number 2 |
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| (termFormat EnglishLanguage BallBearing "ball bearing") | Cars.kif 1405-1405 |
| antecedent |
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| (=> (instance ?BB BallBearing) (attribute ?BB Sphere)) |
Cars.kif 1413-1415 | |
| (=> (instance ?BB BallBearing) (material Metal ?BB)) |
Cars.kif 1409-1411 |
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