?? ????????
????:1????????:?????VX
2???????????
3??????????
4?spa????????
5?????????
????
??,?,??,1970????4?????????,????,???
?
?,???,????,1972?12????,????,??
??
???,??,?????,1977????5???,??,???
???
?,??,????????,1980?????????8??,?,??
?????????:???