File:EB1922 Telephone - Great Britain - map of scheme for telephonic communication by means of underground cables and telephone repeaters.jpg
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![File:EB1922 Telephone - Great Britain - map of scheme for telephonic communication by means of underground cables and telephone repeaters.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b3/EB1922_Telephone_-_Great_Britain_-_map_of_scheme_for_telephonic_communication_by_means_of_underground_cables_and_telephone_repeaters.jpg/455px-EB1922_Telephone_-_Great_Britain_-_map_of_scheme_for_telephonic_communication_by_means_of_underground_cables_and_telephone_repeaters.jpg?20200113223201)
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