（5）Endurance：*****0
times
（1）Methods of opening:When air supply is engaged, the door
could be opened directly by hand; when air supply not engaged, the
door could open automatically by:①turning the digital lock
clockwise;②pressing on the instrument board the
control buttons for front&mid -
doors;③opening the access hole, press to
release the red button on the right of the solenoid
valve.
（2）Methods of closing:When air supply is engaged, the door
could be closed directly by hand; when air supply not engaged, the
door could close automatically by:①turning the digital lock
anti-clockwise;②pressing on the instrument board the
control buttons for front&mid -doors;③opening the access hole, press to
release the red button on the left of the solenoid
valve.
