Refrigerated semitrailer: heavy truck for transporting goods that must be kept cold.
Refrigeration unit: cooling apparatus.
Vent door: movable panels used to regulate air intake.
Clearance light: lights that indicate the form and dimensions of a vehicle.
Upper side-rail: beam that runs the length of the upper frame.
Rear reflector: light-reflecting device that marks the back end.
Lower side-rail: beam that runs the length of the lower frame.
Support leg: support that holds the semitrailer in a horizontal position.
Sand shoe: piece of metal that protects the end of the support leg.
Front reflector: light-reflecting device that marks the front end.