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self-sealing flap /ˈsaɪzməɡɹˌafz ˈtuː/ n

中文：自粘封口

中文 · 自粘封口Español · solapa autoadhesivaFrançais · patte autocollante
Meaning：Flap coated with an adhesive substance; it seals an envelope on contact.
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Office communication supplies

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