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The disable without hands have difficulty opening doors ,especially one-way door. This door is specially designed for those ones by a stamp on the pedal. With a step on the pedal, it has the door unlocked as well as the door opened. It is convenient to come in and out.
Forward to open the door, by a step, the door is to be opened along with the pedal.
As for reverse to open the door,the pedal will be against the door frame enforcing it to be opened.
Quan Qiuyun,Zou Liangping,Wang Wanyue,