wherein said irregular shaped substrates are retained in said panel without breaking until said {HEAD ~ irregular shaped substrates} are detached from {TAIL ~ said panel} 
wherein said irregular shaped substrates are retained in said panel without breaking until said { HEAD ~ irregular shaped substrates } are detached from { TAIL ~ said panel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL