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             Mass Properties: for computing mass properties such as mass, volume, and center of mass. See Mass Properties. 
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             Mass Contributions: for adding extra contributions to a Mass Properties node. This option is only available if a Mass Properties node is selected in the Model Builder tree. See Mass Contributions 
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             Participation Factors: for computing modal participation factors. See Participation Factors. 
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             Response Spectrum: for computing modal participation factors and setting up data for a response spectrum analysis. See Response Spectrum. 
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             Buckling Imperfection for setting up a deformed geometry and associated study when performing a nonlinear buckling study of a structure with imperfections. See Buckling Imperfection. 
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