A frame support structure is automatically positioned to {TAIL ~ a frame} receiving {HEAD ~ position} where the frame is placed thereon 
A frame support structure is automatically positioned to { TAIL ~ a frame } receiving { HEAD ~ position } where the frame is placed thereon
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH