?? ????????!????????4000?
????:1???????????:???????50????
2???????
3???????
4?????????
5????????????????
?????????????????,????,???????????????????????????????????????,??12.49?????????????????,??? 1.13???????????m3,?1.118??m3 ,?? 40 ????????????????????
????????????,?????????????????????,?????200~300kg/??400kg/???,?,?????????????????????,?????
???????:???