| 摘要 |
In a ring binder, to permit the reception of a push-in panel which can be read both from the back of the ring binder and from the front thereof, a transparent window is provided which is formed by a film strip (7) which is connected to the front and back covers (1, 2) only by, in each case, two weld seams (8-11) arranged at an angle to each other.
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