Home / Standards / GB/T 4622.1-2009 GB/T 4622.1-2009 Abolished Classification for spiral wound gaskets 缠绕式垫片 分类 Standard Type GBT ICS 23.040.60 CCS J15 Status 废止 Issue Date 2009-11-15 Implementation 2010-09-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A