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mikeyashworth: Overhead Equipment for 25kV 50 cycle AC railway electrification : brochure TD GS 24 issued by British Insulated Callender's Construction Company Limited : 1957
©
mikeyashworth: Overhead Equipment for 25kV 50 cycle AC railway electrification : brochure TD GS 24 issued by British Insulated Callender's Construction Company Limited : 1957