Home / Standards / GBT 228.4-2019 GBT 228.4-2019 Metallic materials — Tensile testing — Part 4: Method of test in liquid helium 金属材料 拉伸试验 第4部分:液氦试验方法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A