It is intended that a plurality of such reflective pairs or groups may be assembled in {HEAD ~ a properly oriented bank} of {TAIL ~ any desired length}, according as the energy demands of the application required 
of
It is intended that a plurality of such reflective pairs or groups may be assembled in { HEAD ~ a properly oriented bank } of { TAIL ~ any desired length } , according as the energy demands of the application required
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH