Home / Standards / GB 7947-1997 GB 7947-1997 Abolished Identification of conductors by colous or numerals 导体的颜色或数字标识 Standard Type GB ICS 29.020 CCS K09 Status 废止 Issue Date 1997-09-01 Implementation 1998-08-01 Responsible Dept 国家标准委 Drafting Unit N/A