软铜绞线(TJR-1)标称截面(毫米2)结 构股数×根数单线直径(毫米)计算外径(毫米)计算重量(公斤公里)2.57×70.262.3424.0647×70.322.8836.4467×70.393.5154.081012×70.394.8692.7116127×0.496.11146.52519×70.497.32231.93519×70.588.70324.95019×70.681