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EntityQ170124· pop 70· linked from 593 articles

信封

thumb|upright=1.35|alt=Front of an envelope mailed in the U.S. in 1906, with a postage stamp and address|Front of an envelope mailed in the U.S. in 1906, with a postage stamp and address thumb|upright=1.35|alt=Back of the above envelope, showing an additional receiving office postmark|Back of the above envelope, showing an additional receiving post office [[postmark]]

AI overview

An envelope is a flat, usually paper container designed to hold and protect letters or documents during mailing. It matters because it allows correspondence to be safely transported through postal systems, with space for addressing and postage stamps to ensure delivery to the intended recipient.

AI-generated from the Wikipedia summary — may contain errors.