GB/T 2351-2021流体传动系统及元件硬管外径和软管内径标准
英文:Fluid power systems and components—Outside diameters of tubes and inside diameters of hoses GB/T 2351-2021介绍: 国家标准《流体...
英文:Fluid power systems and components—Outside diameters of tubes and inside diameters of hoses GB/T 2351-2021介绍: 国家标准《流体...