It's not written in permanent marker and sealed in a security envelope with super glue.
并不是用记号笔写下来，装进一个十分密封的信封里，最后用万能胶粘起来。
The utility model provides a sanitary convenient envelope with glue which is convenient for sealing and can not stick letter paper.
本实用新型向公众提供一种便于封口，既不会粘住信笺，又讲卫生的带胶方便信封。
Furthermore, if the envelope is widely used, in the stamp production, glue is not needed to be brushed on the back side of the stamp.
另外，若广泛使用这种信封，邮票生产就可不必刷背胶了。
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