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GB/T 28474.1-2012
工业过程测量和控制系统用压力/差压变送器 第1部分:通用技术条件
Pressure/Differential-pressure transmitters for use in industrial-process measure and control systems - Part 1: General specification
GB 28931-2012
Safety and sanitation standard for chlorine dioxide disinfectant generator
GB/T 983-2012
Covered electrodes for manual metal arc welding of stainless and heat-resisting steels
GB/T 28757-2012
Cranes other than mobile,tower and floating cranes and tower cranes - General requirements for stability
GB/T 28473.2-2012
Temperature transmitters for use in industrial-process measure and control systems - Part 2: Methods of evaluating the performance