绝缘子 / 串 Insulator/String 双分裂导线双联耐张串 Double Tension Strings for Two-Bundle Conductor 7 2* . < 32 95 . < . 2 &$ 7 0; 单导线单联悬垂串 Single Suspension String for One Conductor 7$ 32 :)7 # (.& 229