"Aeromax 12" shockproof oil insulated single focus X-Ray tube with air-circulator for cooling, designed for diagnostic and superficial therapeutic use, by Machlett, Springdale, U.S.A., 1947-1955 "Aeromax 12" shockproof oil insulated single focus X-Ray tube with air-circulator for cooling Radiomedicine 1947-1955
