The pliability of the intermediate layer compensates for {TAIL ~ any irregularity} or misalignment of {HEAD ~ the cutting edge} of the cylinder relative to the gel or membrane 
The pliability of the intermediate layer compensates for { TAIL ~ any irregularity } or misalignment of { HEAD ~ the cutting edge } of the cylinder relative to the gel or membrane
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH