Keywords: Press 50 000 tons Alcoa.jpg fr Presse hydraulique de 50 000 t de pression utilisé par Alcoa construite dans le cadre du Heavy Press Program 2014-05-31 00 42 47 Library of Congress Library of Congress PD-USGov Uploaded with UploadWizard Forging presses Economy of Cleveland Alcoa Cleveland Works Historic Mechanical Engineering Landmarks Industrial heritage in Ohio |