长途对称电缆
long distance symmetric cable
高频对称电缆
HF symmetrical cables
high frequency symmetrical cable
数字通信对称电缆
symmetrical cables for digital communications
symmetrical category cable
按要求的电信业务
demand telecommunication service
铺设电缆-电缆铺设
Cable assemblies
cable temination equipment
[轴的]对称度
degree of symmetry [of the axis