Home / Standards / GB/T 32957-2016 GB/T 32957-2016 Active Cold-drawn or cold-rolled precision inside diameter seamless steel tubes for hydraulic and pneumatic system service 液压和气动系统设备用冷拔或冷轧精密内径无缝钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2016-08-29 Implementation 2017-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A