| 摘要 |
A mailing envelope (4) having a transparent or translucent coplanar window (2) comprising a first sheet (1) having a window (2) cutout with edges encompassing the cutout, forming the major portion of the mailing envelope (4), and a second sheet (3) having edges coextensive with and bonded to the edges of the window (2) cutout in the first sheet (1), forming the window (2). |
