| 摘要 |
A diary having hidden spring is provided to have beautiful appearance by hiding a spring to the outside and separating inner paper and outer paper of diary. A diary having hidden spring comprise a cover body (10) attached to the girth of inner paper (11) and outer paper (12) and central part of cover body. The central part separates to the inner paper and outer paper. The inner paper has two row of punched hole to insert the spring into the separated inner paper. The separated inner paper and outer paper has folding line (10a, 10b).
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