{HEAD ~ a securing rod} inserting through said bores into said support bars and being capable of screwing into {TAIL ~ one notch} on said securing plate, thereby locking said supporting shank into one position; and 
capable of screwing into
{ HEAD ~ a securing rod } inserting through said bores into said support bars and being capable of screwing into { TAIL ~ one notch } on said securing plate , thereby locking said supporting shank into one position ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH