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Sometimes,the old people may find it hard to insert the key into the keyhole when opening the door as it is not easy to aim at the hole. With the help of this door openner, it will be more convenient and efficient for the aged to open the door. Its shape is designed to be held easily and save labour. With specially structure and identifiability,it enlarge the area to aim at and make the key insert more quickly and easily.
South China Agriculture University
Guangzhou, China
Han Guo
South China Agriculture University
Guangzhou, China
Haidan Liang , Shengjin Zeng