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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP3948877ApriorityCriticalpatent/JPS53125064A/en
Publication of JPS53125064ApublicationCriticalpatent/JPS53125064A/en
PURPOSE: To make possible the detection of the change of an electromagnetic flowmeter with time and its calibration by comparing and monitoring the mean frequency of the pulsation of fluid in piping and the output of the electromagnetic flowmeter.