GB/T 1409-1988
固体绝缘材料在工频、音频、高频(包括米波长在内)下相对介电常数和介质损耗因数的试验方法
Methods for the determination of the permittivity and dielectric dissipation factor of solid electrical insulating materials at power,audio and radio frequencies including metre wavelengths
GBT1409-1988, GB1409-1988