Home / Standards / GBT 20645-2021 GBT 20645-2021 Special environmental conditions — Technical requirements for low-voltage electrical apparatus used on plateau 特殊环境条件 高原用低压电器技术要求 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A