牌号：ERZr2/R60702、ERZr4/R60705

规格：ф (0.5-6.0)*Lmm

执行标准：ASTM B550/B550M-07(2012)、AWS A5.24/A5.24M:2005、ASME SFA-5.24/SFA-5.24M、GB/T 8796-2010