internal IfcDuctSilencer(DatabaseIfc db, IfcDuctSilencer s) : base(db, s) { mPredefinedType = s.mPredefinedType; } public IfcDuctSilencer(IfcObjectDefinition host, IfcObjectPlacement placement, IfcProductRepresentation representation, IfcDistributionSystem system) : base(host, placement, representation, system) { }