Mechanisms

The ____________________ of machines has ____________________ gone hand - in - hand with scientific and ____________________ progress , discoveries of ____________________ materials and industrial developments .

The gearbox of a Formula 1 ____________________ is made up of helical gears that transmit the force and ____________________ from inside the engine to the car's ____________________ . It might look like a complex , modern machine , but the mechanisms it ____________________ have been the basis of many machines throughout ____________________ .

For example , they were used ____________________ Leonardo da Vinci ____________________ many of his ____________________ .