The pressing device is configured to press {HEAD ~ the openably closable unit} toward the open position in which {TAIL ~ the unit} is extended 
The pressing device is configured to press { HEAD ~ the openably closable unit } toward the open position in which { TAIL ~ the unit } is extended
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH