FIG 2 further shows that {HEAD ~ covers} 21 are arranged between {TAIL ~ the latching means} 18, 19 
are arranged between
FIG 2 further shows that { HEAD ~ covers } 21 are arranged between { TAIL ~ the latching means } 18 , 19
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH