A cotton picker is a complex piece of agricultural equipment made up of hundreds of components that must work together precisely. When one part wears out or fails, finding the correct replacement ...

Freehand sketching is the quickest way to capture initial design ideas on paper before they are forgotten, often done without rulers or templates. Annotation can be added to sketches to show key parts ...

A mechanical watch is a watch that uses the power of the unwinding of a wound mainspring as its power source, and while many relatively inexpensive watches are quartz-powered, mechanical watches are ...