?????12*1.8*7????·?????÷????????????????
??·????????????????????????10??2000??8000 76??<BR>10??2000??8000 70??<BR>4??1500??8000 21??<BR>10??2000??8000 70??<BR>4??1500??800035??<BR>4??1500??8000 80??<BR>8??1800??8000 70??<br><br>??·???????????????????????????? ??????????г????????????????????????????????????????????????跽??????????????????????磬??????????????????
??·????????????????????????
10??2000??8000 76??
10??2000??8000 70??
4??1500??8000 21??
10??2000??8000 70??
4??1500??800035??
4??1500??8000 80??
8??1800??8000 70??
??·????????????????????????
???? ??????????г????????????????????????????????????????????????跽??????????????????????磬????????????????? 5m ???????????????????????? 5m ????????? 5m ???? 5m ?????????????????????????? 5m ???????涨??????????????????????и???
????????
??????????????????????????????????????????????????????????????????????????????λ???????????????????????????????????????????????
?????12*1.8*7????·???????????????????????????
