GB/T 7253-2005
标称电压高于1000V的架空线路绝缘子 交流系统用瓷或玻璃绝缘子元件 盘形悬式绝缘子元件的特性
Insulators for overhead lines with a nominal voltage above 1000V--Ceramic or glass insulator units for a.c.systems.Charateristics of insulator units of the cap and pin type
GBT7253-2005, GB7253-2005