?? ?????????????????????
????:1???????:??????????
2???????
3???????
4??????????
5?????
????1?????????3??? (?????? ?????? ???????)????3???
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????????15???,???????????????
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??????,?????6.2???????,???????????,????????550????????????????????,?????????????????
?????????,????,??????????????,?????????????????170????????????????????,???
?,??????????????????,???????????????????????????????????????????,????????160??,???????5???,????6????????,??10????,????????20%?(???) ?????:???