THM-11Mn2SiAH11Mn2SiA0.06/0.151.40/1.850.80/1.150.0350.0250.200.300.20SJ101用于焊接重要的低碳钢及部分低合金钢结构天津大桥THM-11Mn2SiA焊丝大桥THM-11Mn2SiA焊丝THM-11Mn2SiA焊丝THM-11Mn2SiA埋弧焊丝天津焊丝***丝天津***丝H11Mn2SiA焊丝)