Roller-Smith type spec R-S-303 radio frequency current ("Amperes approximate"), scale 0 - 2.5, open back, adjustment screw on front. overall: 1 1/2 in x 3 1/2 in; 3.81 cm x 8.89 cm ...
Read at the Annual Meeting of the Massachusetts Medical Society, Section of Radiology and Physiotherapy, June 3, 1935. Chaffee, B. L. — Gordon McKay Professor of Physics and Communication Engineering, ...
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