In {HEAD ~ contrast}, {TAIL ~ the airstream pattern} and electric field of a typical electrostatic spray gun system are tightly coupled, which generally constrains electric field manipulation and powder particle distribution 
In { HEAD ~ contrast } , { TAIL ~ the airstream pattern } and electric field of a typical electrostatic spray gun system are tightly coupled , which generally constrains electric field manipulation and powder particle distribution
OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH