Westinghouse duct sizing calculator, card ready re

Made:
1965 in Maywood

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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
type:
ready reckoner (engineering)
credit:
Auction Team Koln
status:
Permanent collection

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