Engineering: driving wheels of a railway locomotive, and section of piston. Coloured lithograph, 1905, by Stanislas petit. https://www.rawpixel.com/image/13967737/image-technology-public-domain-architectureFree Image from public domain licenseDe Land pool. Aircraft construction class. These carefree high school students are learning the serious business of war… https://www.rawpixel.com/image/12239446/photo-image-hand-people-airplaneFree Image from public domain licenseHalftrac scout cars. Putting precision-made pistons assemblies into precision-made cylinders is a job that fits this former… https://www.rawpixel.com/image/12240178/photo-image-plant-person-technologyFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Finished master piston rods of the one-piece type, awaiting assembly in… https://www.rawpixel.com/image/12302139/image-airplane-factory-architectureFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Pistons, complete with rings, are lined up for assembly in Pratt and Whitney… https://www.rawpixel.com/image/12302165/image-plant-planes-factoryFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Installing rings on pistons for Pratt and Whitney airplane engines in a… https://www.rawpixel.com/image/12301943/image-plant-person-airplaneFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. They'll soon be adding to the power of our mighty American air forces. Rough… https://www.rawpixel.com/image/12308155/image-background-pattern-airplaneFree Image from public domain licenseAluminum casting. Womens' place in this large Midwest aluminum factory is on the inspection line. She's giving a final… https://www.rawpixel.com/image/12306815/image-person-airplane-womensFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Pistons, complete with rings, are lined up for assembly in Pratt and Whitney… https://www.rawpixel.com/image/12307134/image-plant-planes-factoryFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Single-row piston rods for Pratt and Whitney airplane engines are cleaned… https://www.rawpixel.com/image/12307009/image-face-plant-personFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Master piston-rod forgings for Pratt and Whitney airplane engines are… https://www.rawpixel.com/image/12307294/image-plant-person-skiesFree Image from public domain licenseProduction. Aircraft engines. A veteran of the assembly bench, twenty-two-year-old Anne Weinmen, employee of a large Midwest… https://www.rawpixel.com/image/12307027/image-face-plant-handFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Careful inspections between honings assure compliance with rigid standards… https://www.rawpixel.com/image/12306997/image-hand-person-artFree Image from public domain licenseProduction. Aircraft engines. A veteran of the assembly bench, twenty-two-year-old Anne Weinmen, employee of a large Midwest… https://www.rawpixel.com/image/12306797/image-face-plant-handFree Image from public domain licenseMessrs. Maudslay, Son, and Field's Works, Lambeth: Copenhagen Dock Engines by P Barry https://www.rawpixel.com/image/14320440/image-background-person-public-domainFree Image from public domain license