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Hitachi Ltd
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Hitachi Ltd
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Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP8504677ApriorityCriticalpatent/JPS5420673A/en
Publication of JPS5420673ApublicationCriticalpatent/JPS5420673A/en
PURPOSE: To perform tube connection of easy removal and good airtightness by burying the clearance between the large and small tube diameters of a magnetic material of high magnetic permeability with a magnet and magnetic fluid.