????:1?????????:??3???????

2????????

3?????????

4???????????

5?????mm

??????????????40????????????????“???????”????,2??????????????????13????,???????«?????????2»?

???,«??2»??????????????,???????????????????????????,?????????

??,?????,??“????”?

???,????????????????IP,???????????,???????????????,“?????????”(???????????? ?? ??)

??:???????????