悬臂式掘进机 履带行走机构通用技术条件
Boom-type roadheader-general technical condition of crawler mechanism
1999-11-11
GB/T 20645-2021
特殊环境条件 高原用低压电器技术要求
Specific environmental condition—Technical requirements of low-voltage apparatuses for plateau
2021-03-09
GB/T 20626.1-2017
特殊环境条件 高原电工电子产品 第1部分:通用技术要求
Specific environmental condition—Electric and electronic products for plateau—Part 1:General technical requirements
2017-09-29
GB/T 22580-2008
特殊环境条件 高原电气设备技术要求 低压成套开关设备和控制设备
Specific environmental condition - Technical requirements of electric equipments used for plateau - Low-voltage switchgear and controlgear assemblies