In the alternative to assembly 22, a specular surface may be formed by vapor deposition of aluminum directly onto {HEAD ~ the surface} 21 of {TAIL ~ the support} 20 
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In the alternative to assembly 22 , a specular surface may be formed by vapor deposition of aluminum directly onto { HEAD ~ the surface } 21 of { TAIL ~ the support } 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH