本标准规定了同心敷设铝绞线的要求，包括或不包括钢筋绞线的中心芯。这些配电系统为单相或三相架空导线。

This Standard specifies requirements for concentric-lay aluminum stranded conductors, with or without a central core of reinforcing steel strand. These conductors are intended for overhead installation on single-phase or three-phase electrical distribution systems.