| 摘要 |
The pack comprises a box (1), a flexible bag (2) made from a gastight material, a nozzle (4), a hollow float (5) pierced with holes (5b) and capable of floating on the open surface (8) of the liquid (3) contained in the bag (2), and a tube (6) connecting the inside (5a) of the float (5) to the outside of the bag.
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