GB/T 20645-2021特殊环境条件高原用低压电器技术要求标准
英文:Specific environmental condition—Technical requirements of low-voltage apparatuses for plateau GB/T 20645-2021介绍: 国家标...
英文:Specific environmental condition—Technical requirements of low-voltage apparatuses for plateau GB/T 20645-2021介绍: 国家标...