????????????0.4*1*2???·?????÷??????????????????
?????·?????????????????
??·????????????????????????
8??1800??8000 80??
8??1800??8000 35??
8??1800??8000 80??
8??2000??8000 32??
8??2000??8000 42??
??·????????????????????????
???????
????????í???????????·?????·?????????纣??????
????????????0.4*1*2???·?????????????????????????????
