?? ??????? ????????“????”???
????:1?????????:?????300??
2???????????
3?????
4????????
5????????????
?12???4?? (??????? ?)?,??????????12???????????????????4????12???????????????????46?,???,????????????,?,????“??????????????”??????????
????SAR(?????)??????,????????????????,??????????????
12?4?????,?????????,???????????????????????????? ????????“?”?????????????,????????????????????????????????????,???????????????????????????????,?????????300?????????450?????????,??1.4??1.8??,???????????
?28???????????????????????(????)
????:????????