By : structural steelwork, rack, municipal and structural engineering communities metal production, installation (involving state regulations require special approval after obtaining approval to operate).
By : structural steelwork, rack, municipal and structural engineering communities metal production, installation (involving state regulations require special approval after obtaining approval to operate).
承揽：钢结构、网架、市政、路桥金属结构工程的制作、安装（涉及国家规定需专项审批的取得审批后经营）。