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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Application filed by Sumitomo Electric Industries LtdfiledCriticalSumitomo Electric Industries Ltd
Priority to JP9938876ApriorityCriticalpatent/JPS52128582A/en
Publication of JPS52128582ApublicationCriticalpatent/JPS52128582A/en
PURPOSE: By inserting cable supporting copper wire covered with insulating membrane or copper-weld wire into the middle of hollow conductor, cable can be suspended in the air inside the pipe.