Further, channels are formed by removing {HEAD ~ portions} of {TAIL ~ the substrate} other than the bodies on the substrate 
of
Further , channels are formed by removing { HEAD ~ portions } of { TAIL ~ the substrate } other than the bodies on the substrate
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH