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   SoundPressureLevelUnit
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| appearance as argument number 1 |
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| (documentation SoundPressureLevelUnit EnglishLanguage "The Class of all UnitOfMeasure that measure a sound pressure level.") | Merge.kif 7451-7452 | |
| (subclass SoundPressureLevelUnit UnitOfMeasure) | Merge.kif 7450-7450 | 子類 SoundPressureLevelUnit and UnitOfMeasure |
| appearance as argument number 2 |
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| (instance Decibel SoundPressureLevelUnit) | Merge.kif 7455-7455 | 例 Decibel and SoundPressureLevelUnit |
| (instance DecibelA SoundPressureLevelUnit) | Merge.kif 7465-7465 | 例 DecibelA and SoundPressureLevelUnit |
| (termFormat EnglishLanguage SoundPressureLevelUnit "sound pressure level unit") | Merge.kif 7453-7453 |
| consequent |
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| (=> (hearingAcuity ?H (MeasureFn ?N1 ?U) (MeasureFn ?N2 ?U)) (instance ?U SoundPressureLevelUnit)) |
Medicine.kif 1740-1744 |
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