Hutchison Calculator No. 2; Gas and Air Flows in Smooth Pipe

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Country of manufacture: USA,            Date of manufacture: >= 1964
Diameter: 17.2 cm diameter disk mounted on 25 cm square back.
Materials: Plastic laminate
Cursor: All plastic; lines =
Scales on Backplane:
Scales on Disk:
Back: blank
Condition: C2 (Mint but without all extras)
Came with: nothing

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