| 摘要 |
PROBLEM TO BE SOLVED: To provide a key capable of being smoothly operated at a time without confirming an insertion of the key into a key hole. SOLUTION: For the key having a key part 2 inserted into the key hole and a grip part 3 mounted on the key part, an indication means 10 for enabling the feel of the direction to be inserted into the key hole in the key part to confirm.
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