Labels:book | bulletin board | comic book | earth | poster | tribute album OCR: 5 INDUSTRY Leonardo des igned BALL BEARINGS many mechanisms ingenious that are essential components of modern-day machinery all bearings, long used in and book on planned the to subject. write His mechanics, have many work came 400 years functions today including keeping before the first known automobil es running smoothly by systematic study of reducing friction between the wheel and machine elements in the chassis The bearings today are the 19th century typically contained in round holder called a race similar to the one Leonardc invented Leonardo realized that there that touch would allow be each less each other ball friction so to he if rotate built the in balls freely didn't separators This INDUSTRY device was reinvented in 1772, almost 300 years after Leonardo first drew if "Mechanic ...
(.png)
(Broderbund)(Riverdeep)(2004).iso/LEOWINMV/PRTPICTS/BALL.PIC/BALL.png)