Home / Standards / GB/T 4437.1-2015 GB/T 4437.1-2015 Abolished Aluminium and aluminium alloy extruded tubes—Part 1: Seamless tubes 铝及铝合金热挤压管 第1部分：无缝圆管 Standard Type GBT ICS 77.150.10 CCS H61 Status 废止 Issue Date 2015-12-10 Implementation 2016-07-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A