| 摘要 |
PROBLEM TO BE SOLVED: To improve operability by simplifying complicated, easy-to-mistake operation like combinational operation of keys of a portable terminal. SOLUTION: A necessary function is run by mounting a chip for commands on the portable terminal and then a user is released from complicated key operation. The chip for the commands is formed in a small-sized coin, card, or stick shape for noncontact operation to improve the portability and breakage resistance.
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