(Sumitomo Denki Kōgyō KK), and Sumitomo Heavy Industries, Ltd. (Sumitomo Jūkikai Kōgyō KK), are descended from subsidiaries of Sumitomo’s copper interests. Sumitomo Electric, established in 1897, is a major producer of electric wire and cable. Sumitomo Heavy Industries, established as a separate company in 1934, became a major producer of…
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