17th-century mentor spring in Lisbon Carriage Museum The earliest identified leaf springs commenced showing on carriages in France in the mid-17th century in the shape of the two-section elbow spring (since the illustrated case in point from Lisbon), and later on migrated to England and Germany,[six] appearing about the carriages https://howardh256hcu8.daneblogger.com/34512225/the-5-second-trick-for-axle-assembly