It is inspiring to discover technology related to tribology throughout the history of mankind. This paper describes sketches produced by da Vinci in the 15th century corresponding to modern bearings and notable tribological achievements in Japan from ancient times. Explained herein are a project to construct bearing models based on da Vinci’s sketches. a fire-making device used ... https://www.rxkaitori.com/product-category/tridonic-pc-dd-combo/