| http://www.w3.org/ns/prov#value | - Referring, first, to prior art, it is, of course, known to provide bags, such as formed from a thin walled plastic sheath, or tube, by severing a segment from an elongated, or endless, tube T of such material by a straight line cut through the entire width of the tube transversely of its length, and then sealing one of the ends of the severed segment thereby providing a tube segment that is closed
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