In some cases {HEAD ~ advantageous images} comprise {TAIL ~ fine lines} of widths not greater than 50 micrometers, even more preferably not greater than 25 micrometers 
comprise
In some cases { HEAD ~ advantageous images } comprise { TAIL ~ fine lines } of widths not greater than 50 micrometers , even more preferably not greater than 25 micrometers
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH