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