A sewing machine works by weaving thread through fabric from the needle above and from the bobbin below, creating very small stitches through the […]
Here is an animation showing how to unlock a lock with (or without, for illustration purpose only) a key! Mordent locks have more complex structures, but they […]
Watch this amazing video about how a mechanical watch works!
Mufflers are installed within the exhaust system of most internal combustion engines, although the muffler is not designed to serve any primary exhaust function. […]
Schematic of an engine running.