???????????????
???????????????????????????????壬????????????????????????????????????β????q????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
?????????????
???????????????
20*2200*6000
22*2200*6000
24*2200*6000
26*2200*6000
28*2200*6000
???5??12????????57??q620qe????????????ж????
