Home / Standards / GB 14050-1993 GB 14050-1993 Abolished Types and safety technical requirements of system earthing 系统接地的型式及安全技术要求 Standard Type GB ICS 29.020 CCS K09 Status 废止 Issue Date 1993-01-04 Implementation 1993-07-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委