| 摘要 |
An envelope is disclosed herein which comprises a perforated line 1 formed parallel in proximity to the edge of an envelope 10 preferably at the shorter edge 2 intersecting the closed flap 5 from one edge 3 to the opposite edge 4. The sealed envelope can be opened by tearing along the perforated line 1 until the two parts 6 and 7 are completed separated.
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