The holder has a second engagement part for {HEAD ~ engagement} of {TAIL ~ the first engagement part} and the first mating part 
of
The holder has a second engagement part for { HEAD ~ engagement } of { TAIL ~ the first engagement part } and the first mating part
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH