According to another aspect of the present invention, a conical nozzle cap mounted on {HEAD ~ the front side} of the housing around the nozzle tip and adapted to guide currents of air passing through the open spaces to the outside of {TAIL ~ the housing} 
According to another aspect of the present invention , a conical nozzle cap mounted on { HEAD ~ the front side } of the housing around the nozzle tip and adapted to guide currents of air passing through the open spaces to the outside of { TAIL ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL