Public domain
Production. Steam power plant equipment. This lever operates a control valve on a 6,000-ton hydraulic press on which parts for high-pressure boilers are formed. Steam boilers and other power-house equipment to supplement the hydroelectric installations of the Tennessee Valley Authority (TVA) system
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Credit lineProduction. Steam power plant equipment. This lever operates a control valve on a 6,000-ton hydraulic press on which parts for high-pressure boilers are formed. Steam boilers and other power-house equ. 1942-01-01. Palmer, Alfred T., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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