?? ??????:??600??????????
????:1?????94?????:??????
2??????????
3???????
4??????????
5?????
?????????? ?? ???? ?
??????4000?? ??“C?”
????????:??????????????????
?????? 1/512??8??,??????(???),???3.1??,????????????????????????????5000??????????/????????????????,???600?????????????,??????85%????,?90%????????????
???:?????
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