GB/T 22137.2-2008 工业过程控制系统用阀门定位器 第2部分:气动输出智能阀门定位器性能评定方法 Valve positiongers for use in industrial-process control system - Part 2: Methods of evaluating the performance of intelligent value positiongers with pneumatic outputs
Valve positiongers for use in industrial-process control system - Part 2: Methods of evaluating the performance of intelligent value positiongers with pneumatic outputs