{HEAD ~ The apparatus} 1 wherein said first set of through holes and said {TAIL ~ second set} of through holes comprises a plurality of holes 
wherein
{ HEAD ~ The apparatus } 1 wherein said first set of through holes and said { TAIL ~ second set } of through holes comprises a plurality of holes
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH