| http://www.w3.org/ns/prov#value | - It is subjected only to the normal storage aging, which in this case is an advantage, because the more the rubber of the hollow core body 20 loses in resistance through aging against an expansionary force, the easier it may be expanded by the pressure prevailing in its interior and the easier its expansionary pressure compensates the contractional pressure loss of the product container 7 and the r
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