Answer: AIRFLOW
Explanation:Chassis is the part of a physical structure which helps to carry its load and gives some support to the physical structure or equipment. Vehicles generally have chassis,most are numbered, it numbering is to ensure easy identification. The AIRFLOW helps to guarantee efficiency by controlling the movement of air into the working parts of equipment which could be the ENGINE or in a GENERATOR . Airflow system has also been adopted in cooling equipments like REFRIGERATOR or an AIR-CONDITIONING. Typically,air moves from Front to back.