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IfcContextDependentUnit |
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IfcConversionBasedUnit |
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IfcDerivedUnit |
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IfcDerivedUnitElement |
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IfcDimensionalExponents |
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IfcMeasureWithUnit |
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IfcMonetaryUnit |
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IfcNamedUnit |
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IfcSIUnit |
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IfcUnitAssignment |