This category encompasses machine parts and mechanism components that serve as constituent elements of industrial machinery. It includes drive components, transmission components, control components, and frame components that are incorporated into industrial machines such as machine tools, conveying machinery, packaging machinery, and printing machinery. The focus is on individual parts and components that constitute machines, rather than finished machinery products, and these are distinguished from general-purpose mechanical element parts such as bearings and gears. These components are used for assembly and maintenance at machinery manufacturers, as well as for procurement of replacement parts during equipment modifications.