??????????????
???????????????????????????壬????????????????????????????????????β????q????????????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
????????
??????????????????????????????????????????????????л??????????????е????????绰?????????????????????
??????????????
14??2000??8000 35??
14??2000??8000 70??
8??2000??8000 21??
8??2000??8000 70??
8??2000??8000 32??
8??2000??8000 70??
10??2000??8000 21??
?????20*1800*C??Q420q???????嚰????????
