The truth is that all the intermediates between humans and their ancestors (which diverged from the common ancestor of humans and chimpanzees) are now extinct (and there was likely no fundamental distinction between humans and their ancestors).
Rim brakes. Rim brakes are so called because braking force is applied by friction pads to the rim of the rotating wheel, thus slowing it and the bicycle. Brake pads can be made of leather, rubber or cork and are often mounted in metal shoes. Rim brakes are typically actuated by a lever mounted on the handlebar.
A press brake is a machine used for metal plate bending. It has a frame, bed, ram, and drive. Press brakes are designed to deliver accurate vertical blows. The integral parts of a press brake includes the housing, brake, bolster plate, bed, ram, gibs, and drive. Main parts.