China 'GB/T 21421.1-2008
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 21421.1-2008
Composite string insulator units for overhead lines with a nominal voltage greater than 1000V - Part 1: Standard strength classes and end fittings 标称电压高于1000V架空线路用复合绝缘子串元件 第1部分:标准强度等级和端部附件
Issued Date:2008-01-22
Implemented Date:2008-09-01
Issued by:
The Standardization Administration of the People's Republic of China