The method comprises the first step of {HEAD ~ heating} with electromagnetic radiation a fluid restrictor, followed by {TAIL ~ the step} of flowing fluid through the restrictor 
The method comprises the first step of { HEAD ~ heating } with electromagnetic radiation a fluid restrictor , followed by { TAIL ~ the step } of flowing fluid through the restrictor
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH