The method 26, wherein {HEAD ~ the outlet} comprises {TAIL ~ a plurality} of sharp conducting tips 
comprises
The method 26 , wherein { HEAD ~ the outlet } comprises { TAIL ~ a plurality } of sharp conducting tips
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH