Ring laser angular rate sensors of the type referred to commonly utilize {HEAD ~ a block} of {TAIL ~ material} that is dimensionally stable, both thermally and mechanically 
Ring laser angular rate sensors of the type referred to commonly utilize { HEAD ~ a block } of { TAIL ~ material } that is dimensionally stable , both thermally and mechanically
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH