| 摘要 |
<p>The envelope is reversible and may contain documents in the reply. In the first condition envelope has all sides folded inwards. The edges may be glued down for closing. The edges may be reversed by folding after the envelope has been received. The edges may be coated with self adhesive glue, in such a way that only one edge of each part of the envelope is coated. The envelope may be pre-printed on one side, and may be fitted with an additional strip to seal in any included documents or letters.</p> |
