{HEAD ~ The biasing member} applies force to the stopper for pulling in {TAIL ~ the stopper} into the receiving portion 
{ HEAD ~ The biasing member } applies force to the stopper for pulling in { TAIL ~ the stopper } into the receiving portion
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH