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Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Linear
Reed X-Ray Technic Computer
Carl. W. Reed
USA
Plastic
c. 1939
6.9 cm x 17.6 cm
Medical X-Ray
Notes:
"1) Used to calculate voltage and current for an X-Ray tube to achieve correct film exposure 2) Note the rule has 2 slides 3) The reverside side has tables for various body parts, dimensions and patient age"
Image 1
Image 2