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