双联耐张绝缘子串
strain twin suspension string
四联耐张绝缘子串
transposing strain four insulators chain
耐张绝缘子串
tension insulator string
tension six string insulators
四联绝缘子串
fourfold insulation string
多裙式绝缘子
multi-petticoat insulator
四联耐张
strain four-string insulator set