40Mn2方鋼 40Mn2熱軋方鋼

方鋼、熱軋方鋼、扁鋼、熱軋扁鋼、冷拉方鋼、冷拉扁鋼、方鋼廠家現貨材質(A3 Q235B 45# Q345B 16Mn Q345C 40Cr 65Mn 35CrMo 42CrMo等)規格:8*8-16*16,20*20,22*22,25*25,30*30,40*40,50*50,60*60,70*70,80*80,90*90--…