40#define NEU_ELEM_PROP_UNKNOWN 0
41#define NEU_ELEM_PROP_ROD 1
42#define NEU_ELEM_PROP_BAR 2
43#define NEU_ELEM_PROP_TUBE 3
44#define NEU_ELEM_PROP_LINK 4
45#define NEU_ELEM_PROP_BEAM 5
46#define NEU_ELEM_PROP_BEAM2 37
47#define NEU_ELEM_PROP_SPRING 6
48#define NEU_ELEM_PROP_DOFSPRING 7
49#define NEU_ELEM_PROP_CURVEBEAM 8
50#define NEU_ELEM_PROP_GAP 9
51#define NEU_ELEM_PROP_SHEAR 11
52#define NEU_ELEM_PROP_SHEAR2 12
53#define NEU_ELEM_PROP_MEMBRANE 13
54#define NEU_ELEM_PROP_MEMBRANE2 14
55#define NEU_ELEM_PROP_BENDING 15
56#define NEU_ELEM_PROP_BENDING2 16
57#define NEU_ELEM_PROP_PLATE 17
58#define NEU_ELEM_PROP_PLATE2 18
59#define NEU_ELEM_PROP_PLANESTRAIN 19
60#define NEU_ELEM_PROP_PLANESTRAIN2 20
61#define NEU_ELEM_PROP_LAMINATE 21
62#define NEU_ELEM_PROP_LAMINATE2 22
63#define NEU_ELEM_PROP_SOLID 25
64#define NEU_ELEM_PROP_SOLID2 26
65#define NEU_ELEM_PROP_MASS 27
66#define NEU_ELEM_PROP_MASSMAT 28
67#define NEU_ELEM_PROP_STIFFMAT 30
68#define NEU_ELEM_PROP_SYMSHELL 35
69#define NEU_ELEM_PROP_SYMSHELL2 36
virtual void Read(class CNFData *nfd)=0
virtual void WriteData(class CNFData *nfd, FILE *fp=0)=0