The presence of the intermediate layer allows {HEAD ~ the cutting tool} to safely and completely cut {TAIL ~ a spot} and remove the cut spot from the gel or membrane without scratching or otherwise damaging the surface, and with at most a temporary depression in the intermediate layer 
to completely cut
The presence of the intermediate layer allows { HEAD ~ the cutting tool } to safely and completely cut { TAIL ~ a spot } and remove the cut spot from the gel or membrane without scratching or otherwise damaging the surface , and with at most a temporary depression in the intermediate layer
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH