In {TAIL ~ this construction}, {HEAD ~ the sampler} 1″ includes a top ply 3″ and a bottom ply 5″ having upper and lower surfaces 3 a″,5 a″ and 3 b″, 5 b″, respectively 
In
In { TAIL ~ this construction } , { HEAD ~ the sampler } 1″ includes a top ply 3″ and a bottom ply 5″ having upper and lower surfaces 3 a″,5 a″ and 3 b″ , 5 b″ , respectively
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH