| 摘要 |
PROBLEM TO BE SOLVED: To provide a means by which the user can arbitrarily set up the free recombination of lock and key without using any electric means. SOLUTION: (1) Grooves or holes are opened at a plurality of positions on each disc and a magnet is used at a separate point from the lock to specify one of these positions. (2) For simplifying the structure, a cover A is used to conceal all openings at a plurality of positions, except one opening. COPYRIGHT: (C)2006,JPO&NCIPI
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