... applied to high voltage power line service.And Have features of good gydrophobicity,anti-ageing,anti-leakage Composite Post Insulator ... applied to high voltage power line service.And Have features of good gydrophobicity,anti-ageing,anti-leakage trace and electric ... quakeproof and brittle failure proof,light weight,easy to installation,and the installation iutline of top and base are the same size with ...