Pset_MaterialCommon
常见的材料属性集合。
IfcMaterial IfcMaterial分子量材料（通常为气体）的分子量。分子量孔隙率材料（Vbr-Vnet）/Vbr所占总体积的空隙率。孔隙度质量密度材料质量密度。质量密度。
| Name | Type | Description |
|---|
| MolecularWeight |
P_SINGLEVALUE / IfcMolecularWeightMeasure |
| |
Molecular Weight |
Molecular weight of material (typically gas). |
|
| Porosity |
P_SINGLEVALUE / IfcNormalisedRatioMeasure |
| |
Porosity |
The void fraction of the total volume occupied by material (Vbr - Vnet)/Vbr. |
|
| MassDensity |
P_SINGLEVALUE / IfcMassDensityMeasure |
| |
Mass Density |
Material mass density. |
|
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