???????????????
???????????????????????????????壬????????????????????????????????????β????q????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
????????????????
?????г????????????????к???????????????????????????????г??????????????10~40?????????????????????????????????????????????????????????????????г???????????????????????????????????????а????????????????????????λ???????????????????????????????????
???????????????
8??2000??8000 35??
8??2000??8000 42??
8??2000??8000 21??
8??2000??8000 32??
12??2000??8000 79??
12??2000??8000 35??
6*2200*800035??
8*2000*9000 21??
10*2100*9000 32??
12*2100*8000 84??
???7??24????????480??q345qc??????????г????????????
