??????????????2?6??,?“??”????,???????????????????50???????????,????7???????????,????????(???????????????? ????????????????? ????)
????:?????
???GPS??2????:????????
?????????????
?????????????????????
???????«????»?????????
????????????????????
??:???????????????“??”
??????????5?7??????????
????????4????????????
????????????????????
????:????????????&???????
???«???»???????????(?)
????14:????????????
??:???????????????????
?????1.2?A??????????????
?????????????????????
??????????????????
??:?????????????????
??20???????????????
???????????????????2??
????U16??????:????????????
??:???????????????????
??:???????????????????
??????:?8050??,22??????
????????????????????
??????:??????????????