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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk
Ducting Calculator
M.H. Mear & Co.
England
Plastic
est. 1960's
Dia. = 19.5 cm
Construction
Notes:
"Ducting calculations for temperature, air velocity, duct dimensions, pressure etc."
Image 1
Image 2
