Furthermore, even if the stopper has become elongated due to repeated opening and closing of the cover, {HEAD ~ the biasing member} still retrieves {TAIL ~ this elongated portion} within the receiving portion 
retrieves
Furthermore , even if the stopper has become elongated due to repeated opening and closing of the cover , { HEAD ~ the biasing member } still retrieves { TAIL ~ this elongated portion } within the receiving portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH