?? ???? ??????1600?????“??????”
????:1?????????????:???????
2??????????
3???????
4?????vx
5????????????
?2?????5????????????????? (???????? ?????????????????????????)??5??,????????,?????,????????1600?????“??”?????????,??????????????????3??????????3.5kg????????????????????(?????????????????????)?????????????
??????????,???????????(???)???,???20??????????????,?,???????????????8????????,????????,?????????????????,??,???
?????????????????????????????“??,?????????”????????????????????????????,???????????????????120?????????????????,????????????????????,??,?????????????
?????(????)“????????????,???”??????????????????????????,??,????,?????????,???,??????????????,??,????????,???????
“?‘????????????????????????’????,????????,?????”???,???????????????(?????????????????)
???????????:?????????????