[德国标准] IEC 60534-8-4-2005 Industrial process control valves –Part 8-4

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英文版IEC 60534-8-4-2005 Industrial process control valves –Part 8-4:Noise considerations Prediction of noise generated by hydrodynamic flow

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IEC 60534-8-4-2005 Industrial process control valves –Part 8-4

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