| http://www.w3.org/ns/prov#value | - According to the invention, the spliced unvulcanized innertube, already provided with a valve stem and valve, is open-vulcanized, i.e. unconfined and unsupported except by a surface, and is preferably vulcanized in the flat, folded position with its valve stem located substantially centrally in respect of its tube width, and partially inflated and with rods inserted in the end folds.
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