{HEAD ~ The securing} of the plate to the underlying structure causes {TAIL ~ the pickup arms} to release the plate, whereupon they swing upwardly to pick up another plate to continue the process 
{ HEAD ~ The securing } of the plate to the underlying structure causes { TAIL ~ the pickup arms } to release the plate , whereupon they swing upwardly to pick up another plate to continue the process
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH