China 'GB/T 17194-1997
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 17194-1997
Conduits for electrical purposes--Outside diameters of conduits for electrical installations and threads of conduits and fittings 电气导管 电气安装用导管的外径和导管与配件的螺纹
Issued Date:1997-12-26
Implemented Date:1998-12-01
Issued by:
The Standardization Administration of the People's Republic of China