???????????
?????????????
24*2400*4500
16*2500*6400
16*2500*6400
16*2000*8000
12*2200*9600
?????????????
???????????????????????????壬????????????????????????????????????β????q????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
????8??20?????16*1800*C??q420qd???????????????
