To this end, the plug in assembly is sufficiently transparent and translucent for {HEAD ~ the light wavelength} of {TAIL ~ the light} used for curing 
of
To this end , the plug in assembly is sufficiently transparent and translucent for { HEAD ~ the light wavelength } of { TAIL ~ the light } used for curing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH