{HEAD ~ An upper and lower housing} interconnected by {TAIL ~ a flexible bellows} are pivotally connected to one another for movement between a folded inoperative position and an erected operable position 
interconnected by
{ HEAD ~ An upper and lower housing } interconnected by { TAIL ~ a flexible bellows } are pivotally connected to one another for movement between a folded inoperative position and an erected operable position
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH