????????????20*1800*C????·?????????г???????????λ???
???????????????????????
10?·????й?PMI????50.9??????3?????????????????ü????????????????????????????????????????????????г?????????????????????????????????????????????????????????????????????????????????????????????????????г???????δ?????????販??????????????????????????????????????????????????????????????????????л???????????????????
??????????????????????
8??1800??8000 90??
8??2000??8000 70??
8??2000??8000 32??
10??1800??8000 70??
10??2000??8000 90??
10??2000??8000 32??
12??2000??8000 56??
??????????????????
????????
??????????????????????????????????????????????????????????????????????????飬????????????????????????紹???
????????????20*1800*C???????????????????г???????????λ???