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Hermann Eberhard Kettler
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11,504. Kettler, H. E. June 25. Cables.-Submarine cables for quick signalling have the armouring and sheathing wires interconnected at the joints and completely insulated from the main conductor and lead sheathing. The armouring-wires and lead sheathing are earthed at each end.
GB190011504D1900-06-251900-06-25An Improved Process for Fitting Submarine Cables for Quick Signalling
ExpiredGB190011504A
(en)