??????????????????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
???????????????????????
?и?Э????????????????????1~2?????????????????????????47???????2013?????????????51
????????????????????????????г?????????????????????????????????????????????????
?????????????г?????ì???
??????????????????????
14??2000??8000+ 70??
8??2000??8000+ 21??
8??2000??8000+ 70??
8??2000??8000+ 32??
8??2000??8000+ 70??
10??2000??8000+ 21??
10??2000??8000+ 70??
???????? ???????лл ?? ????? ????????????????????
??????????118mm????????????????????????