In the present device, the size and geometry of the spray plume is strictly determined by the kinetic energy of the emerging particles and the spray cone angle; that is, by {HEAD ~ the ease} with which the spray particles can escape from the sprayer tip into {TAIL ~ the ambient air} 
In the present device , the size and geometry of the spray plume is strictly determined by the kinetic energy of the emerging particles and the spray cone angle ; that is , by { HEAD ~ the ease } with which the spray particles can escape from the sprayer tip into { TAIL ~ the ambient air }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL