Matches in DBpedia 2014 for { ?s ?p ' Toroidal 0.175 H loading coil for an AT&T long distance telephone trunkline from New York to Chicago 1922. Each of the 108 twisted pairs in the cable required a coil. The coils were enclosed in an oil-filled steel tank ' on the telephone pole. The cable required loading coils every 6000 ft .. }
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- Loading_coil footer "' Toroidal 0.175 H loading coil for an AT&T long distance telephone trunkline from New York to Chicago 1922. Each of the 108 twisted pairs in the cable required a coil. The coils were enclosed in an oil-filled steel tank ' on the telephone pole. The cable required loading coils every 6000 ft .".