?? ????:51.2?????? ???????
????:1???????:???????????
2?????98???
3??????
4???????
5?????600?????
???????????,????,?????????????????????51.2????,??,??,????????????????????,??,10??????????,?????
???,??????????????????????????????400??????,????,????,????
(???? ???????? ???? ?????????? ??????)
??????????????:?????????????