?? ??GPS??????????? ???3??????
????:1?????:??????
2????????
3?????????
4???????????
5???????
?11?????????????25??? ???????????:?????????«???????»?????????????????????,??????24?????,??????,???3??????????????,???????GPS?“??????????????????”?
??????????????,?????????????????????10?????,????
??????????????????,?????,??????????GPS???????,???????????????????????????,???????????????????
«?????????»?,??????GPS???????????????????,??,??,??
????????????????,??????,???,?????(?????????????) ???:??????????