Moreover, {HEAD ~ modifications} and variations in {TAIL ~ the materials} employed may be developed, as will the techniques of applying the island forming material onto the base layer 
in
Moreover , { HEAD ~ modifications } and variations in { TAIL ~ the materials } employed may be developed , as will the techniques of applying the island forming material onto the base layer
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH 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