Structures, namely, fairings and body cowlings used on and attached to tractor trailer truck trailers to reduce aerodynamic drag and improve fuel economy

device in the nature of an automotive body cowling made of plastic which is used on and attached to tractor trailers to reduce air and wind friction levels and improve fuel economy

structures, namely, fairings and body cowlings used on and attached to tractor trailer truck trailers to reduce aerodynamic drag and improve fuel economy