This child group gathers mechanical engineering inventions built to shape materials or move heavy loads on a worksite, including machine tools such as milling and the hydraulic press, construction equipment such as the bulldozer, excavator, steam shovel, road roller and concrete mixer, and lifting and moving equipment such as the crane, conveyor belt, elevator, escalator, forklift, winch, pile driver and industrial robot. Their shared work is manufacturing, building or relocating something too large or heavy to handle by hand, as distinct from the engines that power these machines or the farm and mill machinery that processes raw produce.