????????q420qc?纣?????÷???????г????????????
????纣?????????????????
?纣????????????????????????
22*2500*10200
47*1850*5460
47*1850*5460
52*2150*5800
41*2480*9450
?纣????????????????????????
????
?????????????MPa 345-305 ????????????bMPa 510-490???????5??21??
Q345QC???????????Q345QC??????
????????q420qc?纣??????????????????г????????????
