??????????????????
6??1500??8000 21??
6??1500??8000 42??
6??1500??8000 35??
6??1500??8000 21??
8??2000??8000 64??
??????????????????
???????????????????????????????????????????????????500-650???????л???????????????????????????????????????????????????????????????????е?????
???????????????????
???????????????????????????????????,δ??10??,??????????????????????????????????,??????????????????????????????????????,??,????????????????????????????????????????????г???????????????????????????????????????????????
????????6.0*1000*4000??16Mnq???????????????
