| 摘要 |
<p>The invention relates to a packaging comprising an envelope (2) with an opening (5); a neck (6) connecting onto the opening and having a cap (12) arranged on the neck; and a valve closing off the opening, which valve comprises a valve body (16) extending over the opening and provided with at least one passage (17), and an internal channel (14) which is arranged in the cap and which extends over the passage and whereof a channel edge (20) forms a valve seat for the valve body. In preference a distance a of the valve seat to the valve body is adjustable. <IMAGE></p> |
