Home / Standards / GB/T 5099.4-2017 GB/T 5099.4-2017 Active Seamless steel gas cylinders—Part 4: Seamless stainless steel gas cylinders 钢质无缝气瓶 第4部分:不锈钢无缝气瓶 Standard Type GBT ICS 23.020.30 CCS J74 Status 现行 Issue Date 2017-12-29 Implementation 2018-07-01 Responsible Dept 国家标准委 Drafting Unit N/A