??????????????????
4??1500??8000 21??
10??2000??8000 70??
4??1500??800035??
4??1500??8000 80??
8??1800??8000 70??
6??1800??8000 80??
???????????????
???????????????????
????????????????????????????????????????????????????????????????????????????????????????????????????????;?????????????????????????????????????????????????????
????12??31?????????25*1800*C??16Mnq?????????????????
