| 摘要 |
Bag for receiving bulk material and in particular cement, having a bottom seam and an opposite filling end wherein a receiving space is provided between the bottom seam and the filling end provided to receive the bulk material and formed by the bag wall. A de-aeration device is disposed in the bag wall between the bottom seam and the filling end for de-aerating the bag interior after filling. The de-aeration device comprises a semi-permeable membrane inserted in the bag wall. The membrane is air-permeable and water-impermeable.
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