The inner wire and outer hull is attached to each other to bear the high electricity power and heat power 2相与相及相与外壳紧贴在一起，故能承受较大的电动应力和热应力。
2.
The outer hull of the wire has been moulded by rolling with small volume and pretty appearance to insure its enough flexibility and high carrent bearing . it can be installed under the circumstances of over six meters of span 1外壳采用冷轧钢板一次性滚压成型，外型美观，大大增强母线抗弯强度，载荷性能强，适合于6米以上大跨距场所安装。
