{TAIL ~ The stopper mechanism} is configured to control and release opening of {HEAD ~ the openably closable unit} 
{ TAIL ~ The stopper mechanism } is configured to control and release opening of { HEAD ~ the openably closable unit }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD