| 摘要 |
Improved bag-on valve which comprises a flexible bag (4) made of impermeable material and which is provided with an opening sealed by a valve (6) which makes it possible to fill the bag (4) with a desired product, whereby the empty bag (4) is rolled up or folded round a longitudinal axis (X-X') and is maintained in the rolled-up position, characterised in that the bag (4) is provided with means making it possible to elongate the bag (4) while it is being filled with the desired product
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