Home / Standards / GB/T 28712.5-2012 GB/T 28712.5-2012 Abolished Types and basic parameters of head exchangers - Part 5：Spiral heat exchangers 热交换器型式与基本参数 第5部分：螺旋板式热交换器 Standard Type GBT ICS 71.120.30 CCS J75 Status 废止 Issue Date 2012-09-03 Implementation 2013-01-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委