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