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