?????????????2????15????????,???60??????????????????,??????????????????30?(??9.14?????????)??15?????????(?????????????4.57????)????
?,????????,??
?????
???????????????????,???
?1965???2????????15?????????????????????????????????????????
?,?,??????,??“???????????????”???,??????????????“??51????”???,?????????(? ???????????? ?? ??)
?:?????
?????????????:??????
?????????????????????
???GPS??2????:????????
??:??????0.7???????5.84?
??20???????????????
?????????????????????
????:????????????????
?????????????5???7???
??????!????«????»?????
???????????????????????
?????????????????????
?????10?????????????
??:??????0.7???????5.84?
2017???????????
??????J?:?????????????
?????10?????????????
???«???»???????????(?)
????????????????????
??????????5?7??????????
????????????????????
??«??»?????????????
??!?????????????/?????????…
??:???????????????????
??????:??????????????
??20???????????????