Home / Standards / GB 1693-81 GB 1693-81 Rubber, vulcanized—Method for determination of power-frequency permittivity and dielectric loss tangent 硫化橡胶工频介电常数和介质损耗角正切值的测定方法 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A