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GB/T 41004.2-2021 Intelligent pipe network system-Part 2 :Intelligent plastic pipes , fittings and valves - 英文版 |
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GB/T 22137.2-2018 Valve positioners for industrial process control systems—Part 2: Methods of evaluating the performance of intelligent valve positioners - 英文版 |
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GB/T 28270-2012 Intelligent valve electric actuator - 英文版 |
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GB/T 22137.2-2008 Valve positiongers for use in industrial-process control system - Part 2: Methods of evaluating the performance of intelligent value positiongers with pneumatic outputs - 英文版 |
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