路边线/路缘线 kerb line

线路绝缘 line insulation

线路绝缘子串 line insulator string

电车线路绝缘子系列 Indoor plastic loaded insulator series ; Tram lines insulator series ; Needle type insulator series

边缘路线 peripheral route

自动线路绝缘测试装置 ALIT ; Automatic Line Insulation Tester

金属绝缘性线路板 IMPCB

通讯线路绝缘子 communication line insulator