The definition of mechanism and pipe bender comes from mechanical engineering, which belongs to the most basic concept in modern mechanical principle. The modern concept of Chinese hydraulic tube bending machine is mostly derived from the word "mechanical" in Japanese. The mechanical engineering of Japan defines the mechanical concept as follows: A machine is a combination of objects, and it is difficult to deform assuming that a force is applied to each part thereof. There also are manual cold saw machine and so on. These objects must achieve mutual, single, defined movements. Transform the applied energy into the most useful form or transform it into effective mechanical work. So where does the force come from and where did it go? What is going on with this process?