| 摘要 |
<p>The access spout has a collar (4) at one end of an access tube (2) with a thin wall which can be perforated and placed inside the tube and separating the interior of the tube into two sealed zones. The tube wall has an area of reduced thickness between the perforable wall and the second end of the tube and the latter is closed by a weld. The access tube can be formed in one piece. The collar can be folded into a V-section with a rounded base.</p> |
