Bodies

     The body structure includes chassis frame and body shell. The first supplies allmounts for mechanical components，such as engine, transmission, suspensions andsteering system，characterized by relevant and concentrated reaction forces. The bodyshell is the container hosting passenger and useful loads；it can be mounted on the chassisframe or be unitized with it, as in modern cars. The term chassis，not to be confused withthe same word, indicating in this case the chassis frame or structure, implies that part ofthe vehicle including all mechanical elements useful for vehicle motion and their supportingframe.