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