Home / Standards / GB/T 6556-2016 GB/T 6556-2016 Abolished Type,main dimension,material and marking of mechanical seals 机械密封的型式、主要尺寸、材料和识别标志 Standard Type GBT ICS 21.140 CCS J22 Status 废止 Issue Date 2016-08-29 Implementation 2017-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会