• Elevators and things you may not know yet

    Elevators and things you may not know yet
    Elisha Graves Otis' invention of elevator brakes is considered the most important breakthrough of the nineteenth century, as it represents the development of skyscrapers.
  • Note when using motorcycle disc brakes

    Note when using motorcycle disc brakes
    Disc brakes make braking force larger and more efficient if used correctly. Conversely, if not used properly, this type of expensive brake can also cause traffic accidents.