Home / Standards / GB/T 12973-1991 GB/T 12973-1991 Abolished Dimensions for commutators and sliprings 换向器和集电环的尺寸 Standard Type GBT ICS 29.160.10 CCS K20 Status 废止 Issue Date 1991-06-06 Implementation 1992-03-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A