| http://www.w3.org/ns/prov#value | - The tube is surrounded by two films 4 and 5, respectively, forming the side walls of the bag by heat welding, said films being connected all the way round except at the portion where the end of the tube 1 is inserted into the bag, it will be seen that the aperture between the jaws has curved corners 6 having a big radius of curvature.
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