???????????????
???????????????????????????????壬????????????????????????????????????β????q????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
?????????????
???????????????
24*2400*4500
16*2500*6400
16*2500*6400
16*2000*8000
12*2200*9600
????5??23????????600??q235qe?????????????????
