protected override string BuildStringSTEP()
{
return base.BuildStringSTEP() + "," + ParserSTEP.DoubleOptionalToString(mLinearStiffnessByLengthX) + "," + ParserSTEP.DoubleOptionalToString(mLinearStiffnessByLengthY) + "," + ParserSTEP.DoubleOptionalToString(mLinearStiffnessByLengthZ) + "," + ParserSTEP.DoubleOptionalToString(mRotationalStiffnessByLengthX) + "," + ParserSTEP.DoubleOptionalToString(mRotationalStiffnessByLengthY) + "," + ParserSTEP.DoubleOptionalToString(mRotationalStiffnessByLengthZ);
}