Positive Displacement: The Peristaltic Pump Prepared By: -Stephanie Arbelovsky -Andrea Hektor -Christina Hynes December 17, 2004.
Gears. What is a gear and how does it work? A gear is a Wheel with teeth that is connected to an axle. Gears are used to transmit power from one part.
Beginning with Braille: Challenges and Choices
