And an advantage of {HEAD ~ this invention} is that it may be advantageously used in parallel to simultaneously preopen {TAIL ~ two sets} of profiles that are attached to the same film 
And an advantage of { HEAD ~ this invention } is that it may be advantageously used in parallel to simultaneously preopen { TAIL ~ two sets } of profiles that are attached to the same film
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH