ICS23.100.40 J 20 GB 中华人民共和国国家标准 GB/T 2878.3—2017 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3部分:轻型螺柱端(L系列) Connections for hydraulic fluid powerPortsand stud ends with metric threads and O-ring sealing-Part 3 :Light-duty stud ends (L series) [ISO 6149-3:2006,Connections for hydraulic fluid power and general use Ports and stud ends with ISO 26l metric threads and O-ring sealing Part 3:Dimensions,design,test methods and requirements for light-duty(L series) stud ends,MOD) 2017-05-12发布 2017-12-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会