| 摘要 |
An identification card holder, on the front side of which a replaceable identification card can be placed. A spring-loaded yo-yo is fastened and positioned on the reverse side of the holder, such that the yo-yo remains partially or completely invisible as the card, along with its holder, is viewed from the front side. As the yo-yo is integrated with the holder, the result will be a small-sized, readily portable, and easy-to-handle assembly, which can be distanced from a bearer to the proximity of a code reader for an electric lock without releasing the suspension.
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