In FIG 8, the hook hanger 260 has {HEAD ~ a mounting bracket profile} 262 conforming to {TAIL ~ a double L type mounting track} 238 
conforming to
In FIG 8 , the hook hanger 260 has { HEAD ~ a mounting bracket profile } 262 conforming to { TAIL ~ a double L type mounting track } 238
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH