Prosthetic - A device that is used as an extension or replacement for a missing body part.
3D Printer - A printer that prints a succession of layers one on top of another in order to create a 3-dimensional object.
Pulley system - A system designed to support a cable that moves along a wheel's circumference, usually to change the direction of a force and to shift the point at which a force is normally applied; commonly employed to lift weights or heavy objects.
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