Home / Standards / GB/T 2878.1-2011 GB/T 2878.1-2011 Abolished Connections for hydraulic fluid power - Ports and stud ends with metric threads and O-ring sealing - Part 1: Ports 液压传动连接 带米制螺纹和O形圈密封的油口和螺柱端 第1部分：油口 Standard Type GBT ICS 23.100.40 CCS J20 Status 废止 Issue Date 2011-12-30 Implementation 2012-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会