Westinghouse duct sizing calculator

Made:: 1965 in Maywood

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Westinghouse duct sizing calculator
Science Museum Group
© The Board of Trustees of the Science Museum

Westinghouse duct sizing calculator, card ready reckoner with English and metric scales, copyright Perrygraf Corporation 1965, printed in U.S.A.

Details

Category:: Mathematics

Object Number:: 1990-675

Materials:: card

type:: ready reckoner (engineering)

credit:: Auction Team Koln

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Westinghouse duct sizing calculator

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