| 摘要 |
An envelope includes a face plate, a rear plate arranged so as to be opposite to the face plate, an outer frame arranged between the face and rear plates and surrounding a circumference, and a face plate joining portion for joining the outer frame and the face plate. A rear plate joining portion joins the outer frame and the rear plate to each other, with one or both of the face plate joining portion and the rear plate joining portion including a sealant having a seal function and an adhesive having an adhesive function.
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