Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Form P-PEC 531 Cable Pressurization Computer
Made by Datalizer Slide Chart for Puregas Equipment CompanyUSA
19737 cm x 30.4 cmCommunications Industry

Notes: 1) Used to calculate the air pressure required to pressurize multiconductor cables 2) Often used in the telephone industry 3) Cables were often pressurized to keep out moisture

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