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