| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a current round shape door knob hard to be opened by a handicapped person having a weak grip insufficient to hold the knob and open a door, especially for a person having a weak grip due to take of two kinds of medicines for fluently flowing the blood in an artificial blood tube for artificial dialysis, like my case. SOLUTION: This handy knob is formed into a polygon. Due to this shape, even a person having a weak grip can easily open the door.
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